Global and Regional IUCN Red List Assessments: 3

In this contribution, the conservation status assessment of four vascular plants are presented according to IUCN categories and criteria. It includes the assessment at global level of Crepis lacera Ten subsp. titani (Pamp.) Roma-Marzio, G.Astuti & Peruzzi and Anthyllis hermanniae L. subsp. sicula Brullo & Giusso and the regional assessment of Commicarpus plumbagineus (Cav.) Standl. (Spain and Europe) and Ambrosia maritima L. (Italy).


Introduction
The text of the global and regional assessment should be submitted electronically to Simone Orsenigo (simone.orsenigo@unimi.it) or to Giuseppe Fenu (gfenu@unica.it); text up to 8000 characters in length (space included) must include a distribution map and a picture of the assessed species. ≡ Crepis lacera f. titani Pamp., Boll. Mus. Republ. San Marino 4: 118 (1920) ≡ Crepis lacera var. titani (Pamp.) Fiori, Nuov. Fl. Italia 2: 839 (1928) Common name: Radicchiella del Monte Titano (It) Geographic distribution range: Crepis lacera subsp. titani ( Fig. 1) is an Italian endemic, confined to Marche (extending to San Marino Republic) and Abruzzo regions (Peruzzi et al. 2014online updates, Roma-Marzio et al. 2015. To date, this taxon is known from 9 localities, which are split into two main groups in Central Italy that could be considered as separate sub-populations due to their geographical separation. The northernmost group (including the locus classicus) is located in part within the borders of the San Marino Republic and in part within the Marche region (Natural Reserve of "Gola del Furlo"). The second one is located in southern Abruzzo (Gole del Sagittario National Reserve; Gole di San Venanzio within the Sirente-Velino Regional Park, and Vallone di Pennapiedimonte within the Majella National Park) (Roma- Marzio et al. 2015) (Fig. 2).
Distribution: Countries of occurrence: Italy and San Marino Republic Biology: Plant growth form: perennial (hemicryptophyte) Flowering time: From May to July Reproduction: No information on pollination strategy or seed germination is available.
Population information: There is no information available on population dynamics. Threats: 1.1. Housing & urban areas: some sites are threatened by the proximity to urban areas.
2.3. Livestock and farming and ranching: some sites are subjected to trampling and grazing by nomadic domestic animals.

CRITERIA APPLIED: Criterion B:
EOO: 4941 km 2 calculated with minimum convex hull polygon in QGIS 2.18 AOO: 28 km 2 calculated with a 2 × 2 km fixed cell grid a) Number of locations: the following five locations have been identified according to threats 1.1 and 2.3: San Marino, Gola del Furlo (Marche region) and three other locations in Abruzzo b) No documented decline in EOO (i), AOO (ii), area, extent and/or quality of habitat (iii), number of subpopulations (iv) or number of mature individuals (v) c) No extreme fluctuations

Red List category and Criteria (Global Assessment) LC Least Concern
Rationale for the assessment: Crepis lacera subsp. titani is an Italian endemics (Roma-Marzio et al. 2015), which occurs in a few sites in Central Italy. Despite the small size of the global population, its proximity to urban areas and the potential grazing impact, there is no evidence of a decline. For this reason, this taxon is assessed as Least Concern at a global level.
Previous assessment: The taxon was not evaluated previously (NE) (IUCN 2016).   (Brullo et al. 1995). It was found by Gussone (1828) near Torre Falconara (between Gela and Licata) and Palmi (today Palma di Montechiaro). There is also an herbarium specimen collected near Terranova (today Gela) by Citarda (FI and PAL). Anthyllis hermanniae subsp. sicula now appears to be extinct as numerous field surveys have failed to find it.
Distribution: Countries of occurrence: Italy (Sicily). Biology: Plant growth form: perennial (chamaephyte). Flowering and fruiting time: From May to June, fruiting from June to July.

Reproduction:
No information is available on pollination, dispersal strategy and seed germination.
Habitat and Ecology: Review of herbarium specimens and the literature suggest that this taxon was restricted to calcareous substrates in a small coastal area of southern Sicily. Currently, this area is severely degraded, since both urban sprawl and agriculture have significantly transformed natural habitats. As a consequence, (sub)nitrophilous or ruderal vegetation types are widespread in the area where this plant was recorded until the nineteenth century. Anthyllis hermanniae subsp. sicula probably disappeared due to urbanization (legal and/or illegal) of the coastal areas, intense exploitation for tourism and related recreational activities, especially resorts, bathing facilities and second homes, as well as for the expansion of agriculture that has affected coastal natural habitats of southern Sicily in the last 50 years.
Population information: No information is available.

CRITERIA APPLIED:
Recent field surveys focused on finding the species in its historical area of occurrence were unsuccessful. The only existing herbarium specimens date to the nineteenth century. Previous assessment: The taxon has been already considered extinct (EX) by Brullo and Giusso del Galdo (2006) Notes: Anthyllis hermanniae subsp. sicula belongs to a species complex which is widespread in the eastern Mediterranean, with some disjunct sometimes punctiform, ranges, in the central and western Mediterranean. In particular, the eastern populations (i.e. Montenegro, Albania, Greece, Crete, Aegean Islands and western Turkey) are morphologically relatively homogenous (Anthyllis hermanniae subsp. hermanniae), while those from the central and western Mediterranean show a remarkable morphological and ecological variability, being found on different substrates ranging from the sea level to 2,100 m a.s.l. In addition, the central-western Mediterranean populations show a very scattered distribution, and are morphologically different, especially in terms of the shape and size of the flower parts. Six subspecies (i.e. subsp. melitensis, japygica, brutia, sicula, ichnusae, and corsica) have been recognized occurring in Malta, Apulia, Calabria, Sicily, Sardinia and Corsica respectively. A. hermanniae subsp. japygica and subsp. brutia was classified as CR (Critically endangered) by Rossi et al (2013).

Gianpietro Giusso del Galdo
Commicarpus plumbagineus (Cav.) Standl.   (Fig. 5) is distributed across C and E Africa, the Middle East and the Mediterranean. In Europe, it is only found in SE Spain (Fig. 6), in the provinces of Alicante, Almeria and Murcia. In Alicante, there are three subpopulations: Sierra de Orihuela, where Cavanilles described the species (1793), Sierra de Callosa (Willkomm and Lange 1862) and Sierra de la Seldeta in the N of the province (Soler et al. 1995). In Almeria, there is a single subpopulation, which was discovered in La Sierrecica by Ruiz de la Torre and Ruiz del Castillo (1974). In Murcia, two subpopulations are known in Alhama de Murcia and Monteagudo (Esteve-Chueca 1959, Sánchez-Gómez et al. 2002. Records from Aguilas and Lorca (no available herbarium specimens) have been dismissed following intense fieldwork and taxonomical confusion has been assumed.

CRITERIA APPLIED: Criterion D:
Number of mature individuals < 1,000 Red List category and Criteria (Regional Assessment):

VU Vulnerable D1
Rationale for the assessment: Commicarpus plumbagineus is restricted to six European subpopulations in SE Spain. It has an extent of occurrence (EOO) of 3,062 km 2 and an area of occurrence (AOO) of 72 km 2 . There is no evidence of a reduction in population size or extreme fluctuations. It lives in relatively inaccessible areas where few direct threats exist, although the proximity to urban areas and the existence of agricultural activities, quarries and roads, as well as the impact of rock-climbing may pose potential threats. The small number of mature individuals (< 1,000) and their poor recruitment capacity make it sensitive to disturbances. It is classed as Vulnerable category (VU D1) at both a national (Spain) and European level.

Conservation actions: Commicarpus plumbagineus is listed as Vulnerable in the Region of Murcia legislation (50/2003 Decree) and as a Protected taxon without threat category in the Valencian Community (6/2013 Order).
Conservation actions needed: Further monitoring and research are recommended in order to better understand the reproductive biology and population trends of the species. Inclusion in the Andalusian catalogue of protected species and protection of those locations which are not yet included in protected areas are suggested.
Notes: Boerhavia plumbaginea Cav. was considered a synonym of B. africana Lour., but according to the description of Loureiro (1790: 16), B. africana does not belong to the Commicarpus genus (Meikle 1978) and is a synonym of B. diffusa L. However, in Spain, the name Commicarpus africanus (Lour.) Dandy has been used since it was published in Flora Iberica (Galán 1990). Common name: Ambrosia marittima (It); Sea Ambrosia or Sea Ragweed (En); Ambroisie maritime (Fr). Geographic distribution range: Ambrosia maritima is endemic to the Mediterranean Basin (Tutin et al. 1976). According to Euro+Med database (Greuter et al. 2006), it occurs in almost all Mediterranean countries, even if it is likely to be extinct in France and it is doubtfully native from Morocco to Libya. Ali (2010) classifies it widespread, but its range is still unclear due to taxonomic issues and confusion with exotic American ragweed (introduced in the Mediterranean from the XIX century). Field and herbarium data suggest that it formerly occurred in several countries and it was presumably widespread in sandy coastal areas. Currently, its range is reduced to few records in Italy, Malta, Greece and Egypt.
Biology: Plant growth form: biennial and short lived perennial (chamaephyte) Flowering time: Ambrosia maritima flowers from July (August) to October; ripe fruits occur in September and October. Reproduction: Wind-pollination; preliminary tests on seed show a very low/null germination rate (unpublished data); seed primary dispersal type is barochory.
Habitat and Ecology: Based on herbarium records and field studies, A. maritima is restricted to coastal dunes. Ali (2010) classifies it as ruderal in Egypt, occurring also in riparian habitats. In Italy, any recent Ambrosia records from ruderal habitats are attributable to exotic ragweeds. In Sardinia, the only extant population grows on fixed dunes, connected to backdune formations dominated by Juncus spp. Data from Italian herbarium specimens indicate that in the past it also occurred on gravel beaches and occasionally in coastal saltworks.

Population information:
Populations have declined at both Italian and European levels and today a large number of records cannot be confirmed. Extinctions occurred both in historical and recent times. There is no detailed information available on population dynamics, but the number of mature individuals at each site can be extremely low and consequently its reproductive fitness limited.
Threats: 1.3. Tourism and recreational areas: The species has recently disappeared from several sites due to building of resorts.
6.1. Recreational activities: Populations that grew near areas which are popular with tourists during the summer, may have been negatively affected by human trampling.
8.1. Invasive Non-Native/Alien Species/Disease: Historical sites which supported A. maritima now support large populations of A. psilostachya DC. (perennial ragweed) that can also colonize sandy coastal habitats.

CRITERIA APPLIED: Criterion B:
AOO: 4 km 2 calculated with a 2×2 km cell fixed grid EOO: 4 km 2 a) Number of locations: one (according to threats 1.3, 6.1, 8.1) b) Decline in EOO (i), AOO (ii), quality and extent of habitat (iii), number of subpopulations (iv). Criterion C: small population size (<250 mature individuals), an observed continuing decline and: a) number of mature individuals in each subpopulation <50 (i); b) % of mature individuals in one subpopulation = 90-100% (ii) Criterion D: Number of mature individuals <50

Red List category and Criteria (Italian Assessment)
Rationale for the assessment: according to recent data, in Italy A. maritima is confirmed only in one site in south-eastern Sardinia, where only two mature individuals were recorded in 2016. Not all historical sites can be confirmed. The decline has been CR Critically Endangered B1ab(i,ii,iii,iv)+B2ab(i,ii,iii,iv)+C2a(i,ii)+D estimated based on the disappearance of this taxon from two Sardinian sites where it was recorded at the end of the 80's. In Sardinia, the extinction of A. maritima is very likely due to the building of new tourist resorts. The extant population is very small in terms of spatial extension and number of mature individuals. For this reason this plant is considered as Critically Endangered at a regional level (Italy). Previous assessment: Least Concern (LC) in Ali (2010) at Mediterranean level. Conservation actions: Ambrosia maritima is not protected by international, national or regional laws. Seeds from the Sardinian population have been collected and their viability and germination tested. The Mediterranean distribution is under investigation (field and herbarium research) in order to understand where the species is still extant.
Conservation actions needed: Research activities are recommended to better understand its reproductive biology, ecology and current distribution and solve taxonomic issues; monitoring programs are strongly encouraged in order to conserve the small Sardinian population and further research should be encouraged in Mediterranean coastal areas in order to reveal possible undiscovered sites. Field research is strongly needed to verify whether the taxon could be present also in other parts of southern Italy (e.g. Apulia and Sicily) where the species has been reported in recent times, but findings were not supported by photographs or herbarium specimens.
Notes: Some authors consider that A. maritima could be an exotic ragweed introduced to the Mediterranean areas in ancient times (due to its medicinal properties). Others doubt that it is a Mediterranean endemic (Essl et al. 2015) and consider it a synonym of A. senegalensis from tropical Africa (The Plant List 2013). To date, the taxonomic relations of A. maritima L. are unclear. The misidentification of A. maritima increases the level of confusion with invasive American ragweeds (mainly A. psilostachya). This problem is mainly related to the lack of reliable identification keys. Very recently, a new identification key to ragweeds was published by the working group of the EU-Cost-Action SMARTER (Karrer et al. 2016). The oldest Italian herbarium specimen of A. maritima dates back at least to the XVI century (herbarium Aldrovrandi) and it might have been collected on the Adriatic sea nearby Ancona, where Aldrovandi wrote that he often found the species (http://botanica.sma.unibo.it/). Given the reduced size of the only confirmed population, A. maritima deserves maximum attention.