NO. 4 MEXICAN MOSSES THERIOT 



39 



RHYNCHOSTEGIUM SAINT-PIERREI Then, sp. nov. 



Valle de Mexico : Contadero, on bark ; leg. Marius Saint-Pierre 

 (Bro. Amahle 1298). 



Fig. 20. — Rhynchostcgiuin Saint-Pierrci Ther. i, stem leaves; 2, apical cells; 

 3, upper cells; 4, median cells; 5, branch leaf; 6, marginal cells; 7, 8, perichaetial 

 leaves ; 9, moist capsule. 



Rh. leptomerocarpo (C. M.) sat simile, sed differt colore smaragdo- 

 viridi, caulibus gracilibus, laxe f oliosis, foliis siccis valde patulis, duplo 

 angustioribus (1.7 mm. X 0.5 mm.), teiiuiter acuminatis, paulum de- 

 currentibus, rete densiore (cellulis mediis 90-120/^x6 /a), foliis peri- 

 chaetialibus duplo majoribus, pedicellis longioribus (2 cm. longis). 



RHYNCHOSTEGIUM HUITOMALCONUM (C. M.) Besch. Prodr. Bryol. Mex. 



107. 1871 



Hypnuni hidtomalconnm C. M. Syn. 2: 248. 1850. 



Morelia: Cascade de Coincho (4712a) ; Andameo (4827). Valle de 

 Mexico: Tlalpam {Bro. Amahle). 



RHYNCHOSTEGIUM LEPTOMEROCARPUM (C. M.) Besch. Prodr. Bryol. 



Mex. 107. 187 1 



Hypnum leptomerocarpum C. M. Syn. 2: 354. 1850. 



Puebla: Hacienda Alamos (586). Morelia: Loma Santa Maria 

 (4868, 4894, 5062). Distr. Federal: Tlalpam (9430a) ; Cuajimalpa 

 (9487, 9489). Valle de Mexico {Bro. Amahle) : Santa Rosa ( 1515 j ; 

 Contadero (131 5). 



