Dichodon (Bartling ex Reichenbach) Reichenbach, Deut. Bot. Herb., 1841

Arabi, Zahra, Ghahremaninejad, Farrokh, Rabeler, Richard K., Sokolova, Irina, Heubl, Günther & Zarre, Shahin, 2018, On the taxonomic status of the genus Dichodon (Caryophyllaceae: tribe Alsineae): morphological and molecular evidence reassessed, Phytotaxa 360 (3), pp. 220-236 : 229

Dichodon (Bartling ex Reichenbach) Reichenbach, Deut. Bot. Herb. -Buch 205. 1841 ≡ Cerastium subg. Dichodon

(Bartling ex Reichenbach 1832: 785) Fenzl (1842: 396) ≡ Cerastium sect. Dichodon (Bartling ex Reichenbach 1832:

785) Grisebach (1843: 207) ≡ Provancheria B. Boivin (1966: 644) .

Lectotype (designated by Ikonnikov 1973): Dichodon dubius ( Bastard 1812: 24) Ikonnikov (1973: 141) [synonym of D. viscidus (M.Bieb.) Holub (1974:273) ].

Description: —Annual, biennial or perennial herbs, glabrous or often glandular hairy in the upper parts. Roots slender, sometimes rhizomatous, or rooting at nodes.Stems erect or decumbent. Leaves lanceolate or spatulate, mostly succulent. The lowest bracts herbaceous, then gradually decreasing to 2‒5 mm, without scarious margins. Inflorescence few- to many-flowered, in terminal or sometimes axillary cymes. Pedicels erect or reflexed in fruit. Sepals ovate to lanceolate, distinct, inner sepals with wide scarious margins, the outer ones without or with narrow scarious margins. Petals 5(‒8) white, slightly to deeply notched. Styles 3 (rarely 4 or 5). Stamens 5‒10. Capsule oblongoid to cylindrical, opening by teeth twice as many as styles, as long as or slightly exceeding the sepals, teeth reclined, patent or circinately revolute. Seeds many, greyish yellow, verrucate. 2n = 36, 38.