20 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 85 



rophylloso, cellulis subquadratis, iox8 /a, laevibus, parietibus incrassa- 

 tis, rete basilar! laxiore, cellulis juxtacostalibus rectangularibus, hya- 

 linis, margines versus quadratis vel breviter rectangularibus. Caetera 

 desunt. 



In color of tbe stems and in form, size, and areolation of the 

 leaves B. ruhricaulis is very close to B. dialytrichoides Ther., from 

 China, differing only in its nearly smooth areolation, I have not seen 

 the fruit. 



BARBULA (Hydrogonium) ABBONII Ther., sp. nov. 



Nuevo Leon: Monterrey {Bro. Abbon 10970). 



A B. rubricauli proximo differt : caule viride, foliis siccis valde 

 patulis, humidis subsquarrosis, brevioribus, 1.4 mm. longis, 0.60-0.65 

 mm. latis, costa latiora, 90-100 /* crassa, cellulis mediis majoribus, 

 15-20 /X.X 10-15 /A. 



The leaves show the median areolation of B. Ehrenbergiana var. 

 mexicana and the basal areolation of B. rubricaulis ; the leaf margins 

 are narrowly revolute three-fourths of the way up from the base. 



BARBULA (Streblotrichum) CALCAREA Ther., sp. nov. 



Morelia: Loma Santa Maria, on calcareous rocks (4891). Valle 

 de Mexico: Desierto {Bro. Amable 1620). 



Fig. II. — Barbnla calcarca Ther. i, 2, 3, cauline leaves; 4, median cells; 

 5, basal cells ; 6, 7, perichaetial leaves ; 8, deopcrculate capsule. 



Pusilla. Caulis gracilis, simplex, 3-5 cm. altus, laxe foliosus. Folia 

 mollia, sicca appressa, humida patula, elliptica vel oblonga, late ro- 

 tundata, decurrentia, marginibus integerrimis, in feme planis, superne 



