MR. F. X. WILLIAMS ON THE GEXUS DIANTHUS. 3S7 



d. imereticus, Rupr. Fl. Caucasl; aact. Enam. spp. varr. 

 Dianthus, p. 12. 



Glaber. Inflorescentia fasciculis florum parvorum. 



Occurs in the province of Imeretia, ia Trans-Caucasia. 



Geogr. limits. — JV. Galicia, in Austria. JE7. Caucasus. 



S. Asia Minor. W. E. Pyrenees. 



This species, which is very difficult to define and circumscribe, 

 together with the European form of P>. sinensis (D. Seguieri, 

 VilL), may be considered as the connecting links between the two 

 natural divisions of the genus, viz., the one in which the stems 

 and their branches bear small clustered flowers, and the one in 

 which they bear large single flowers. The stem terminates in a 

 single head of flowers, or branches into dichotomous fascicles ; 

 or more rarely the flowering branch may be trifasciculate. When 

 an irregular third fascicle is present, it grows from the axils of 

 the uppermost leaves and overtops the other two. 



5. D. hymenolepis, Boiss. Diagn. PI. Hov. Or. ser. I. via. 

 p. 61; Fl. Orient, i. p. 510. 



Puberulus, 25 centim. Caules simplices tetragoni. Folia 

 36 mm., linearia acuminata plana, inferiora patentia 5-nervi:i, 

 cetera adpressa 3-nervia, vagina folii diam. duplo longiore ; in- 

 volucri phylla rubella oblongo-linearia aristata ad capituli apices. 



Flores 2-4-capitati. Bractere stramineae mucronulata) ad calycis 

 apices purpureo-marginata?. Calyx oblongus, dentibus ovatis 

 obtusis rnbeilis. Lamina rosea subcuneata maculata, = ■*■ unguis. 

 Hob. Mesopotamia. 



56. D. poLY^iOEpnrs, Bieb. Fl. Taur.-Cauc. i. p. 324 ; Boiss. 

 Fl. Orient, i. p. 511 ; Reichb. Ic. Bot. PL Crit. n. 730. 



Glaber. Caules 30 centim., teretes apice ramosi. Folia 

 52 mm., elongato-linearia acuminata carinata trinervia patentia 

 stricta, vagina folii diam. triplo longiore ; involucri phylla bracteis 

 similia. Inflorescentia capitulis aggregatis 4-8 florum inodo- 

 rorum. Bractea) straminese mucronatse ad £ calycis. Calyx 

 rubellus, dentibus ovatis obtusis ciliolatis 9-nerviis. Petala con- 

 tigua; lamina subtricrenata rosea obovato-cuneata, = | unguis. 

 AnthersB pallida*. 



Geogr. limits. — N. Pensa, in Russia, 53 d . 



S. Kladovo, in Servia, 44°. 

 E. Orenburg, in Eussia, 55°. 

 W. Upper Austria, 15°. 



