NO. 4 



MRXICAN MOSSES — THERIOT 



-'3 



TORTULA AMPHIDIACEA (C. M.) Broth, in E. & P. Nat. Pflanzenfam. 



i^: 424. igo2 



Barbiilaf ainphidiacca C. M. Linnaea 38: 639. 1874. 



Puebla : Rancho Santa Barbara (4810 p. p.). Morelia: Pare San 

 Pedro, c. fr. (4587) ; Cerro Azul (4932). Valle de Mexico: Conta- 

 dero {Bro. Amahle 1300, 1308 p. p., 1360). 



The plant from San Pedro bears capsules. The fruit being un- 

 known, I describe it : Pedicel short, 6-7 mm., almost hidden by the 





Fig. 13. — Tortula ainphidiacca. i, 2, stem leaves; 3, cross-section of a leaf; 

 4, the same, costa ; 5, upper marginal cells toward a ; 6, median cells ; 7, basal 

 cells ; 8, propagulae. 



long and ntimerous innovations ; capstile oblong-cylindrical. All the 

 capsules are old and have neither operculum nor peristome. 



The species is well characterized in other particulars: The leaf 

 is acute and entire, more or less marginate at the base with several 

 rows of narrow cells, the lamina with differentiated, incrassate and 

 smooth cells ; the costa is percurrent or short-excurrent ; the stems bear 

 oljlong propagula. 



TORTULA RIPICOLA Ther., sp. nov. 



Valle de Mexico: Morales, on earth, bank of a small stream, asso- 

 ciated with Fissideiis tort His Hampe & C. M. (Bro. Amahle 159() 

 p.p.). 



Sterilis, pusilla. Caulis inferne denudatus, superne rosulato-folio- 

 sus, 0.5-1 cm. altus, in axillis foliorum propagula numerosa, fusca, 

 sphaerica gerens. Folia sicca paulum crispula, humore patula, ovato- 

 lanceolata, obtusa vel raro subacuta, breviter mucronata, marginibus 



