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Silene aegaea Oxelman

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Reference: Bengt Oxelman (1995). A revision of the Silene sedoides-group. Willdenowia. 25: 143-169
2. S. aegaea Oxelman species nova - Fig. 2D, 7. Holotype: Run. & Snogerup 6729 "Ikaria. S of Evthelo, near the shore. 24.4.1958" LD! Species nova habitu, pedicelli, et absentia maculis petalorum Silene pentelicae, seminibus petalis emarginatis S. sedoidi similis, sed partibus omnibus leviter majoribus, capsulis foliisque magnitudine et textura inter ambobus intermediis. Stems ascending or erect, 2-8(-20) cm long. Leaves fleshy to succulent, subglabrous or sparsely glandular-hairy. Basal leaves (0.5-)1-3(-4) cm long, with the hairs mostly confined to the margins. Cauline leaves spatulate to (narrowly) obovate. Uppermost stem internode 1-3 times as long as subtending leaves. Flowers in uneven dichasial cymes of 3-6 orders. Lowest internodes of inflorescence 1.0-1.5 times as long as lowermost pedicel. Pedicels upright, 3-25 mm long, of first order 1.5-3 times the length of calyx in fruit, of higher orders 0.5-1.5 times the length of calyx. Calyx cylindrical to narrowly clavate in flower, clavate in fruit, 7-9 mm long. Hyaline margin of calyx teeth usually with many, sometimes glandular hairs. Petal limb pink, paler beneath, without a dark spot at the base, upright when becoming withered, 2-3(-4) mm, emarginate. Coronal scales 1.0-1.5 mm, obliquely triangular, sometimes dentate, white. Anthers white, 0.7-1.0 mm, included in corolla mouth. Gonophore 2-3 mm long. Capsule narrowly ovoid, semimembranous, twice as long as the gonophore, enclosed within the calyx. Seeds greyish black, 0.7-0.8 mm wide, reniform, dorsally grooved with rounded ridges, dorsal testa cells smooth or mamillate, lateral testa cells smooth. Flowering time: April to June. Chromosome number: 2n = presumably 48 (Ikaria, Evdilos, Ox. 2214 [GB]). Counted to approximately 45-50. Ancestry: Based on both morphological and molecular evidence (Oxelman 1995), S. aegaea appears to be of alloploid origin, with ancestors of S. sedoides and S. pentelica as putative parents. It is similar to S. pentelica in habit, stem length, inflorescence branching, pedicel orientation, pedicel length and lack of basal spot on petal. With S. sedoides subsp. sedoides it shares the character states emarginate petals, upright wilting petals and rounded dorsal seed ridges. It is intermediate in leaf texture, capsule form, and capsule texture. It is, however, slightly larger than both in pedicel length, calyx length, capsule length, and seed size. Ecology: Occurring in gravelly habitats just above the supralitoral zone. At the type locality, S. aegaea plants grow in roadside vegetation dominated by Cichorium spinosum L. and Crithmum maritimum L. Although S. sedoides subsp. sedoides grows in the extreme littoral rocky zone just a few meters away, the taxa appear to occupy different ecological niches. Distribution: Endemic to the Ikaria and Tinos (fig. 6), with the type locality as the only one known after the 19th century. I have failed to refind it on Tinos. Specimens examined: G r e e c e: Ikaria: SE of the village Evdilos, 20-40 m.s.m. [26°11'E, 37°38'N], 4.5.1976, *Stamatiadou 19108bis (ATH); ibid., 29.4.1989, *Christodoulakis 2826 (UPA, mixed with S. sedoides subsp. sedoides); ibid., 24.4.1958, Run. & Snogerup 6729 (LD); ibid., 26.6.1993, *Ox. 2214 (GB). Tinos: 12-17.4.1889, Heldreich (BM, JE, K); ibid., 15.4.1889, Heldreich 1015 (BM, K, LD, UPS); ibid., 8.4.1898, Leonis 129 (M). Note: Most of the Heldreich collections are mixed with S. sedoides subsp. sedoides. There are also some plants on these sheets which seem to be referable to S. pentelica.


Superordinate taxon: Silene sect. Sedoideae Oxelman & Greuter (ID: 806)

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No included taxa registered


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