NO. 4 



MEXICAN MOSSES THERIOT 



longus, sporae cliani. 12-18 /'.. — Often mixed with other mosses, and 

 ahiiost always with BraiDiia sec mid a. 



Mexico: Loc. class. (Humboldt ) ; La Lima (Barnes & Land 373 

 p, p.). V'alle de Mexico (Bro. Ainable) : Salazar (1294, 1716) ; 

 Contreras (1470). Hidalgo: Mineral del Chico (Orcittt 6841). 

 Arizona: Santa Rita Alts. (Bartram Si^) . 



The plant from Arizona shows some differences as compared with 

 the INIexican plant, slight differences it is true, but worthy of mention ; 

 it is a little more slender, the leaves are more shortly acuminate, and 

 their cells less regularly bistratose. 



HYOPHILA DENTATA Card. Rev. Bryol. 40: 36. 19 13 

 Moreha: (7896). 



HYOPHILA MEXICANA Ther., sp. nov. 



A alle de Mexico: Tizapan, on earth (Bro. Amable 1613 p. p.). 



Sterilis. Caulis perbrevis ; folia 2 mm. longa, 0.6 mm. lata, margini- 

 bus integerrimis, planis, superne paulum involutis ; cellulis laminae 

 hexagonis, papillosis, parietibus tenuibus, diam. 6-7 /x, costa latissima, 

 90-100 jii., in mucronem brevem acutum excurrente. 



''^^?S '€ '^' 



,fe ^^ 





Fig. 7. — Hyophila luc.ricaua Ther. i, leaf; 2, acumen; 3, cross-section toward 

 the middle ; 4, median cells ; 5, basal cells. Hyophila siibangustiioHa Ther. 

 6, 7, cauline leaves : 8, median cells ; 9, marginal cells toward a ; 10, basal cells ; 

 II, perichaetial leaf; 12, 13, capsules. 



In form, size, and areolation of the leaves this species may be com- 

 pared with H. Bescherellei C, M. It dift'ers in the very short stems 

 and perfectly entire leaves, and in the hyaline basal cells, with thin, 

 soft walls. These last characters distinguish our species from //. frag- 

 ilis Card. 



