—52- 



"Rev. Bryol. 37: 8. 1910. 

 " PoROTHAMNiuM (?) Neomexicanum Card. 



" Soft, delicate, dull green, primary stem creeping, secondary 2-3 cm. long, 

 irregularly pinnate to the base with compressed, widely spreading obtuse or 

 attenuate branches. Leaves six-ranked, soft, complanate, somewhat asymetric, 

 oblong, broadly and shortly acuminate, acute or subobtuse, toward the apex 

 minutely denticulate or subentire, lower margins subundulate and broadly 

 reflexed, then more or less revolute, sometimes nearly plane on one side; costa 

 thin, green, extending to the middle or a little beyond; cells unequal, ovate, 

 oblong and linear, upper shorter, rhomboidal, alar minute, quadrate or roundish. 

 Perichaetial . leaves convolute, long-acuminate, ecostate, entire; basal cells hya- 

 line. Fruit lacking." 



"New Mexico: Socorro County, Mt. Mogallan, near the west branch of 

 the Gila river (O. B. Metcalfe, 1903, comm. A. J. Grout.) " 



" The affinities of this species are very obscure. I had placed it with some 

 doubt in the genus Neckera. I am here following the opinion of M. Brotherus, 

 who thinks it is rather a Porothamnium. The classification of this moss cannot 

 he definitely fixed until the fruit is found. In any case it differs considerably 

 from the P. Bigelovii (Sulliv.) Fleisch. from the Western United States, in its 

 habits, its smaller size, dull green color, looser basal areolation of its soft short 

 wide leaves, slightly denticulate to subentire." 



"Rev. Bryol. 37: 53-54. 1910. 



"HoMOMALLiUM Mexicanum Card. — Monoicous, rather robust, green or 

 yellowish-green. Stem creeping, more or less regularly pinnate, branches 

 short, ascending. Leaves appressed upwards, somewhat homomallous, erect 

 open, ovate-lanceolate, long acuminate, margins plane, entire or sinuate-sub- 

 denticulate above; costa very short or lacking; cells linear, flexuose, obtuse 

 with rather thick walls, alar numerous, subquadrate or roundish, obscure, 

 chlorophyllose. Perichaetial leaves long cuspidate-subulate, margins entire 

 or sinuate. Capsule about 10 mm. long, horizontal, ovate-oblong, curved, 

 convex above and contracted under the mouth when dry; operculum conic, 

 short rostrate; seta reddish " 



"More robust than H. adnatum (Hedw.) Broth. (Amblystegiella adnata 

 (Hedw.) Nichols.)." 



"Var. latifolium Card. Differs from the type as follows: Leaves broadly 

 ■ovate, strongly concave and more imbricate, acumen broader and shorter, alar 

 cells very numerous and somewhat larger and capsule suberect and inclined. " 



"New Mexico, White Mts., Lincoln Co., Wooton and Standley, 1907; 

 comm. A. J. Grout. " 



1. c. 57. 



" Plagiothecium laetum B. & S. var. Neomexicanum Card. Has the 

 habit of the typical European form. It is also similar in size, shape and, areo- 

 la ion of leaves and all the characters of the capsule. It differs in having the 

 transverse striations at the base of the peristome teeth merely on the back??, 

 and the lamellae on the inside less numerous and narrower and the basal mem- 

 brane of the inner peristome short, extending 1-5 the length of the teeth." 



