TraohyphyUuni] mosses (Gepp). 299 



when wet, cordate-ovate acuminate, rather concave, shortly bi- 

 costate; margins erect; back papillate; alar cells multi-seriate, 

 small, quadrate to rhomboid-oblate, reaching to the base of the 

 nerves and to or beyond the middle of the margin, obscured 

 by the contracted, chlorophyllose, primordial utricle ; upper cells 

 linear-elliptic with apices projecting from the back of the leaf. 

 Perichsetium longly exserted; seta elongate; theca inclined, 

 unequal ; operculum brevirostrate. Peristome (in T. gastrodes) 

 teeth with a median furrow outside, and with lamellate trabecular 

 inside; processes plicate and cilia solitary, subequal to them 

 (Duby). Calyptra unknown. 



1. T. gastrodes Gepp. 



Hypnum (Heierocladium) gastrodes Wehv. et Duby in Geneve, 

 Mem.;Soc. Phys. XXI. ii. p. 439. t. v. fig. 1 (1872). Heterovladium 

 gastrodes Jaeg. et Sauerb. Gen. et Spec. Muse ii. p. 311 (1878). 



HuiLLA. — On rocks and old tree-trunks in the elevated rocky parts 

 of Serra da Xella, where the Tarchonanthus woods begin, bearing very 

 scanty fruit, most of the thecas having already fallen off ; however, 

 specimens with a few entire capsules were found June 1860. No. 22. 

 Mixed with No. 32 (Brauiiia arbuscula) but apparently of rather rare 

 occurrence ; on Tarchonanthus in rocky woods at the summit of Serra 

 da Xella ; without fr. June 1860. No. 189. 



This genus is designed for the reception of a few vagrant species 

 which, though mostly unknown in the fruiting state, have in common 

 a well-marked vegetative habit in the expansive movement of the 

 leaves upon the application of water, and in the areolation of the 

 leaves and their papillate dorsal surface. In the leaf-structure an 

 approach to Erythrodontium is indicated, but the inclined, campto- 

 carpous fruit is not found in that genus. 



The other species refered to the genus are : — 



2. T. iNFLEXUM, from Nepal (Wallich). 



Hypnvmi inflexum Harv. in Hook. Icon. PI. Rar. I. t. xxiv. 

 fig. 6 (1836); and in Hook. Journ. of Botany ii. p. 20(1840). 

 Stereodon itijlexus Mitt, in Journ. Linn. Soc. Suppl. i. p. 92 (1859). 

 Pterigyiiandrum inflexum 0. Muell. in Linnsea xxxix. p. 455 

 (1875). Entodon inflexus C. Muell. in op. cit., xlii. p. 435 (1878-9). 

 Platygyriwm inflexum Jaeg. et Sauerb. Gen. et Spec. Muse. ii. 

 p. 342 (1 878). 



The fruit of this species appears to be Stereodontaceous like that 

 of the foregoing species. 



3. T. FEEEICOLUM, from Central Africa (Schweinfurth). 

 PterigynuTidrvm ferricolum C. Muell. in Linnsea xxxix. p. 454 



(1875). Platygyrium brevicoUum Jaeg. et Sauerb. Gen. et Spec. 

 Muse. ii. p. 343 (1878). Platygyrium ferricolum eorund., op cit. 

 p. 742 (1879). 



4. T. FABRONioiDES, from Mauritius (De Eobillard). 

 Pterigynandrum fabronioides 0. Muell. ex Besch. in Ann. Sci. 



Nat. ser. 6. x. p. 292 (1880). Zeptohymenium fabronioides Besch. 

 in loc. cit. 



