8 DB. HOOKEB AND DE. THOMSON S PE^CTJESOEES 



plant; at others, individual plants will present only one form 

 of flower. Such species are of course polygamous, and in some 

 cases the two forms would at first sight be referred to different 

 divisions of the genus, and have indeed been described as different 

 species by our predecessors. The small flowers appear, and arrive 

 at maturity, contemporaneously with the large, and like them pro- 

 duce abundance of seeds. So far as we are aware, this singularity 

 is confined to the Indian species, for we have failed to detect it in 

 the Persian ones that are nearly allied to the Indian, or in any 

 others, though we have searched for them with some care through- 

 out the extra-Indian species. Though unnoticed, we believe, by 

 any naturalist, this dimorphism is a very prevalent character of 

 several species, both tropical and temperate, including the most 

 common of all (C. canescens, "Wall.). 



Nat. Ord. Sttlidie-s:. 



1. Stylidium Kunthii, Wall. An var. S. uUginosi'? 



Hah. Arenosis Bengaliae orientahs ; Silhet ! Wallich, &c., et Chitta- 

 gongi necnon in Peninsula Malayana ad Mergui! Griffith (fl. temp, 

 frigid.) (v. v.) 



2. Stylidium uliginosum, Swartz. 



Hab. Insula Ceylon ! Walker, Champion. — Distr. Chin^ meridionali ad 

 Hong Kong. 



3. Stylidium tenellum, Swartz. 



Hab. Peninsula Malayana ad Malacca ! et Mergui ! Griffith. 



Nat. Ord. Goodenovie^. 



1. Sccevola Kmnigii, Vahl. — S. Bela Mogadam, R. & S. — S. Lamber- 

 tiana, de Vriese. — S. chlorantha, de Vriese. — S. Taccada, Roxb. — 

 S. sericea, Forst. est varietas ramulis, axillis, &c. barbatis. 



Hab. Littoribus oceani ad Ceylon ! Champion ; Martaban ! Concan ! et 

 Scinde ! Dalzell, Stocks, &e. necnon in Peninsula Malayana ! Wallich, 

 &c. — Distr. China! ins. Oceani Indici! et Paeifici! Mauritius! et 

 Madagascar ! 



2. SccBvola Plumieri, Vahl. — S. Thunbergii, Eckl. & Zeyh. — S. uvifera. 

 Stocks (Wight, Ic. 1613). — S. Senegalensis, Presl. 



Hab. Littoribus oceani ad Ceylon! Herb. Thwaites, 1777 i Malabar et 

 Scinde! Vicary Sf- Stocks. — Distr. Africa tropica! India occidentalis ! 

 et in insulis Galapagoeis ! 



