J , 



Acanthacece.'] cbylon plants- 223 



2. P- Gardner!^ Harvey, MS. ; caule simplici, terete, glabro, foliis 

 plurimis capillaceis coronato. — c.p. 2989. 



Hab. On the membranaceous rhizomes of Sydrohryum olivaceum^ 

 Tul. In a rapid mountain stream at Eamhodde, Oct. 1853, Dr. W. H. 

 Survey. 



Caulis i-1-pollicaris. Folia li-2 poll, longa, delicatula, nigro-viridia, enervosa. 

 Inflorescentia ignota. 



Until its inflorescence has been discovered, * some doubt must remain to which 

 genus of the present family this plant is to be referred, and my attempts to trace its 

 further development from the state described above, have been hitherto unsuccessful. 

 Can it possibly be an early stage of growth of Hydrohryum olivaceum ? 



3, HYDROBRYUM, EndL 



1. H, olivaceum^ Tul. 1. c. p. 104 ; Walp. Ann. iii. p. 439. — Fodoste- 

 mon olivaceum, Gardu. 1. c. p. 181.— c.p. 3065. 



Hab. On rocks in the Mahawclle Ganga, and large mountain streams 

 m the Central Province, Gardner, Fl. January to March. 



S 



4. DAIiZELLIA, Wight, Ic. vol. v. par. ii. p. 34. 



{Latvia^ Tulasne. MniantTms^ Walp.) 



1. D. Ceylanica, Wight, Ic. t. 1919-1. — Lawia Zeylanica, Tul. 1. c. 

 p. 112. Mnianthus Zeylanicus, Walp. 1. c. p. 443, Tristicha Ceylanica, 

 Gardn. 1. c. p, 177.— c.p. 3089. 



Hab. On rocks in the Mahawelle Ganga, near Kandy, Gardner, 



CXVIII. ACANTHACE^.^ 



r 



^ [The Indian Acanthacece being in process of examination and re- arrangement at 

 Kew, by Dr. Thomas Anderson, F.L.S., of the Bengal Medical Service, who is pre- 

 paring a new classification of the Order for the Linnsean Society of London, Mr. 

 Thwaitea has, at my suggestion, gladly availed himself of the opportunity of placing 

 his enumeration of the Ceylon species (which was arranged according to Nces's me- 

 thod) in Dr. Anderson's hands. The latter gentleman has kindly devoted some weeks 

 to the study of every species and its synonyms, and has classified the whole in accord- 

 ance with his forthcoming ' Systcma Novum Acanthaceai-imi.' I have added the 

 initials G. Thw. and T. A. to various paragraphs where doubts may arise as to the 

 exact authority for the observations they contain."—/. D. i^.] 



STJBORD. 1. TIIUNBERGIBEM—Mstivatio corolla contorta, Se7m?ia 



cuptdd mjfulta, Tlant(B scandentes, 



TRIE. TIIUNBEUGIEM 



1. THUNBERGIA, Linn. fil. 



1. T. coccinea, Wall. Tent. Fl. ISe^^—Hexacentris, N. ab E. in Wall, 

 PI. As. Ear. ; DC. Prod. xi. p. 61, cum. syn. 



Macrae's specimens, referred to by Nees von Esenbeck, were collected in the Bo- 

 tanic Garden from a cultivated T>lant. as I am informed by 3Ir. ^Uwis, the draughtsman 



* The native name Nelloo is applied to the species of this Natural Family gene- 

 ^y.- G. Thw, 



