-76- 



Since correcting proof of the above I have noted a third Mexican locality 

 for the moss I take to be identical with Tortula caroUniana. A few plants are 

 growing with Pringle's 10449 in my set, which is labeled: " Haplocladium micro- 

 phyllum (Sw.) Broth., det. Cardot. Canada, above Contreras, Federal District. 

 June 7, 1908." The latter is not, however, in my set Haplocladium microphyllum 

 either as to genus or species, and the specimen obviously came from the bark 

 of a tree. 



The illustrations, for which I am much indebted, were drawn by Miss Dor- 

 othy Coker at the New York Botanical Garden. 

 Ithaca, N. Y. 



Explanation of Plate V 



Tortula Caroliniana Andrews 



1. Plant, moist X 2. 6. Apical part of leaf X 200. 



2. Plant, dry X 4. 7. Base of leaf, right side X 200. 



3. Plant, moist X 12. 8. Cells of upper part of leaf X Soo. 



4. Leaf X 40. 9. Apex of leaf with propagula X 50. 



5. Section of costa X 360. 10. Propagula X 120. 



SEMATOPHYLLUM SMALLII SP. NOV. 



R. S Williams 



Autoicous, a male flower often at or near the base of the perichaetium; the 

 inner perigonial leaves short, very concave, with usually an irregular lobe on 

 either side of the base of the short, acute, entire point; antheridia 5-6, about 

 0.125 mm. long, with few or no paraphyses: plants in thin mats with stems 

 mostly 5-6 mm. long, bearing few branches and radicles, the latter chiefly at the 

 base of the stems; stem-leaves mostly nearly straight, widely spreading, more or 

 less complanate or slightly secund, mostly 0.8-1 mm. long, ovate-lanceolate, 

 entire and ecostate; leaf-cells smooth, elongate-rhomboidal to more or less 

 linear with slightly unequally thickened walls, the median cells mostly 5-6 

 wide by 25-40 [L long, the alar yellowish, enlarged and inflated; perichaetial 

 leaves variable in length, the longer a little exceeding those of the stem, more or 

 less serrulate with spreading, sometimes recurved teeth below the point and 

 mostly abruptly narrowed to an acute, slightly serrulate point about one third 

 the entire length; seta 6-8 mm. long, smooth; capsule without lid about 0.6 

 mm. long, inclined or nodding, somewhat obovate, contracted under the mouth 

 when dry, the median exothecal cells nearly square to short-rectangular, the 

 walls slightly thickened at the angles, the stomata, about 25 {L long, in one row 

 near the base; annulus none; outer peristome with teeth 30 [L wide at base and 

 175 ^ long, narrowly furrowed along the median line, cross-striate two thirds 

 up, papillose above; the inner peristome from a basal membrane about one half 

 the height of the teeth, bearing short, solid segments and solitary, papillose 

 cilia; lid about as long as the rest of the capsule, conical, with a slender, oblique 

 beak; spores minutely punctate, about 12 ^ in diameter. 



