414 MR. 3..JT. WILLIAMS ON THE GENUS DIAXXHUS. 



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Calyx purpurascens, dentibus ovato-laneeolatis acutis. Petala 

 contigua ; lamina rosea obovato-cuneata irregulariter dentata, 

 2 unguis. Antherae oblongae. Capsula cylindrica. 



i. tenuissimus, Schur, Fnum. PL Transsilvanice, p. 97 ; and. 

 Pinks Cent. Fur. p. 86. 



Caules graciliter tenuissimi. 



c. flaccidus, ffleb. (sp.) in Flora, 1834, p. 633; Gren. et Godr. 

 FI. de France, i. p. 237. 



Folia plana flaccida. 



d. rnacranthus, Schur, Fnum. PL Trans silvan ice, p. 97: aud. 

 Pinks Cent. Fur. p. 36. 



Flores speciosissimi. Lamina =unguem. 



e. biflorus, mihi. 

 Caules semper biflori. 



f. pulchellus, Pers. (sp.) Sijn. i. p. 494 ; lleichb. Fl. Germ. 

 Fxc. p. 809 ; Icon. FL Germ. Ifelv. f. 5038. 



Folia eaulina acuminata strictiora rigidula breviora. 



g. Henterij Heuff. (sp.) in Wiecjmanns Arcliiv, 1852, p. 303. 



Geogr. limits. — N. Somerset, 51°. F. Prussian Silesia, 18°. 



S. Dauphine, 45°. W. Somerset, 3°. 



This species seems to have been known to Linnaeus only from 

 a drawing in Dillenius' 'Hortus Elthamensis.' Kay (1724) 

 seems to have based his name on the unbranched unifloral stems. 

 Specimens with bifloral stems are more frequently found in 

 S. Germany and Switzerland; and on such forms the variety 

 biflorus is based. In the 3rd edition of ' English Botany' we 

 find it stated, " flowers solitary, usually only one on the stem ; " 

 and in the next parapraph, " flowers generally only one on each 

 stem, more rarely two, £ inch long, 1 inch across." 



117. D. CoLENsor, mihi, Fnum. spp. varr. Dianthus, p. 16. 



G-laber. Caules 60 centim. 4-angulares. Folia stricta ad- 

 pressa ; radicalia 52 mm., 9-nervia oblongo-lanceolata obtusa, 

 eaulina 21 mm. 7-nervia lanceolata acuta plana, vagina folii 

 diam. aequante. Flores solitarii. Bracteae 6 mucronatae, ex- 

 teriores ovato-lanceolatae, superiores obovatae. Calyx dentibus 

 lanceolatis acuminatis. Petala non contigua, lamina alba 

 obovata. — Herb. Kew. 



Hah. Natal. 



