Habitat in Mauritaniae, Italiae, Lusitaniae, Hispaniae, Galloprovinciae nemoribus. " RCN: 6998. **materials_examined:** Original material: Herb. Burser X: 143 (UPS); [icon] in Plantin, Pl. Stirp. Icon.: 598. 1581; [icon] in Clusius, Rar. Pl. Hist. 2: 73. 1601. **diagnostic:**

Inflorescence borne above the foliage; spathe brownish green to green, usually with longitudinal white to pale green stripes, somewhat glossy; spadix-appendix exserted from the spathe.

**distribution:**

Around the Mediterranean basin from Portugal to Israel and from southern France to Egypt. Also present in the Azores.

**general:**

Perennial green cormous herb; corms dark brown, c. 1-2 cm in diam.. rooting from the top part, usually deep in the ground. LEAVES sagittate to cordate c. 7-20 x 5-18 cm. entire with reticulate venation, upper surface shining: petiole 15-40 cm long, brown-purplish mottled, sheathing most of the underground portion of the scape. Scape 15-20 cm long mostly underground, the lower part also mottled and the above soil surface brown-greenish. S INFLORESCENCE: spathe tubular, 4-9 cm long with accuminate tip, the outer surface brown-greenish with white stripes. Spadix usually exserted with inflated tip; female flower at the lower part of the spadix while, male above; ovary ± spherical, style short and stigma capitate. INFRUCTESCENCE: Fruit berries in groups of 3-4. green subglobose. c. 1 cm in diameter.

**habitat:**

Garigue, limestone hillsides, open maquis, especially beneath pinus, undisturbed oliv groves and roadsides, more rarely on consoludated sand.

**discussion:** The protologue of Arum arisarum L. (LINNAEUS, 1753: 966) consists of a short morphological diagnosis, taken from LINNAEUS (1738: 435) and VAN ROYEN (1740: 7), with three synonyms: two are cited from BAUHIN (1623: 196): “ Arisarum latifolium majus ”, “ Arisarum latifolium alterum ”, and one referred to CLUSIUS (1601: LXXIII, Fig. 1) and LOBELIUS (1581: 598) “ Arisarum latifolium ”, as well as locality indication “ Habitat in Mauritaniae, Italiae, Lusitaniae, Hispaniae, Galloprovinciale nemoribus ”. The latter two authors provided the illustrations that can be considered original material. In LINN, the specimen no. 1079.10 (image available at http: // linnean-online. org / 11408 /) includes the annotation “ 15 Arisarum ”, explicitly referring to the number of the species account of Arum arisarum L. in LINNAEUS (1753: 966). The sheet bears four specimens certainly to be referred to a single gathering. BOYCE (1990: 20) cited Brander’s specimen in LINN (no. 1079.10) as “ holotype ”, a typification accepted by GALÁN (2007: 62), but not indicated by GALÁN & CASTROVIEJO (2007: 305). However, JARVIS (2007: 318) indicates that this designation is incorrect, because this material was not received by Linnaeus until after 1753. This herbarium sheet (no. 1079.10) has been written by Linnaeus “ Algir ”. The manuscript list “ Algerica Branderi ”, was prepared around 1756 by Daniel Solander from Brander’s specimens (JARVIS, 2007: 195). At UPS-BURSER, an herbarium sheet exists with original material (sheet X: 143) (Fig. 2). The sheet bears two leaves and one label: “ Arisarum latifolium alterum Baúh. / [illegible] in Hort. / 143 ”. Linnaeus’s citing the polynomial from BAUHIN (1623) provides a link to the specimen in UPSBURSER (Herb. Burser X: 143). Joachim Burser’s herbarium was arranged and labelled according to BAUHIN (1623) TEARN, 1957; JARVIS, 2007) and was cited in the introduction to LINNAEUS (1753) as one of the sources for that work. This herbarium was in Uppsala when it was used by Linnaeus for the interpretation of the names that appear in Bauhin’s work. Therefore, this specimen is undoubtedly original material. However, unfortunately this specimen is very incomplete, and contains only two very different leaves (Fig. 2), and this could have led Boyce to designate the sheet in LINN (no. 1079.10) as the holotype. We have been unable to trace any further original material in any of the other Linnaean and Linnaean-linked herbaria (see also JARVIS, 2007: 318). Therefore, as the herbarium sheet in UPS-BURSER (Herb. Burser X: 143) is very incomplete, we select here as the lectotype the element of the protologue which best matches the traditional and current concept of Arum arisarum. Among the elements cited in the protologue, the illustrations by CLUSIUS (1601) and LOBELIUS (1581) clearly shows the characters of the leaves, spathe and spadix as indicated by LINNAEUS (1753), “ acaule, foliis cordato-oblongis, spatha bifida, spadice incurvo ”, and they are therefore suitable for typification of A. arisarum. These two illustrations are identical, therefore we designated here the Clusius’s illustration as the lectotype (Fig. 1). However, these images do not show an important diagnostic character for distinguishing this species from A. simorrhinum, that is the greater length of the spathe peduncule in respect to the length of the leaf petioles. In addition, an epitype is also designated here in order to avoid any ambiguity in the interpretation of the lectotype specimen.

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