T 



Th b 



.-T 



ii, H. compton: pteridophyta. 



461 



There is some confusion between this species and S. iista^ from which, 

 however^ it seems to be distinct. The stem is decumbent in shelter, erect in 

 the open, branched from near tlie base. The leaves are more distant^ smaller 

 and narrower than in S.iista^ and are not all cordate. The strobili are shorty 

 about 5 mm. long. In exposed situations (739) it has a reddish-brow^n 

 colour like S, iista^ but in shelter it remains green. 



Selaginella itsta Vieilb Plaine des Lacs ; on the level flood-plain ; 

 uncommon; serpentine; 800ft. 370. 



This species differs from S. neocaledonica in the following respects. It is 

 erect and not decumbent. The leaves of the lower plane are closer on the 

 main steuj, and are broader and almost cordate at the base. The stem is 

 unbranched at the base. The strobili are distinctly longer, often exceeding 

 1 cm. The colour is reddish, as in the exposure forms of S. neocaledonica. 

 Hieronymus (in Sarasin and Roux, Nova Cal. B. i. C4) doubts whether 

 S. iista and S. neocaJedonica are not habitat forms of the same species. But 

 the true exposure form of S. neocaledonica is distinct from S, iista. 



S. YiEiLLAiiDiT Warb. (ex descr.). Mt. Dore ; prostrate on soil in open 

 scrub; serpentine ; 800 ft, G69. 



PSILOTALES, 



PSILOTACE^. 



PsiLOTUM TRIQUETEUM Sw. Cauahi ; in hollows on tree-trunks ; 50 ft, 

 Paompai ; on trunks in forest; 500 ft. 1332. Tropics, Japan, New 

 Zealand. 



Tmesiptehis. — My collections of this genus have been examined anatomi- 

 cally by Mr, Birbal Sahni at the Cambridge Botany School ; and it is his 

 opinion (in which I concur) that it is impossible to reduce all the forms to a 

 single species. Three of Dangeard's species — namely, 7m. Vieillardii^ Tm. 

 lanceolata, and Tm, tannensis — should certainly be kept up ; the fourtl?, 

 Tm, truncalaj is of more doubtful validity, and we have therefore combined 

 it, as represented by my 452, with Tm, tannensis^ of wdiich it appears to be 

 a growth variant. 



. Canala ; on trunks of tree-ferns in 



TMESirXEIlIS LANCEOLATA Dang, 



forest; 1500 ft. 1192. 



This species agrees with Tm, tannensis^ and differs from Tm. Viei/lardii in 

 its epiphytic pendulous habit. It is specially distinguished by its acute 

 leaves, not at all truncate but gradually tapering into a long acumen ; tlie 

 substance of the leaf is rather thick, almost coriaceous, and the leaf-margin 

 is marked! v thickened. 



