Parr 2, 1913] DICRANACEAE 81 
TI. EuDICRANELLA 
on with rounded-obtuse apex and costa vanishing well below 
e@ apex. 
Seta yellowish, weak and flexuous; capsule usually not contracted under 
the mouth when dry. 
Leaf-cells with lax, thin walls throughout, the upper and median 
short, irregular or square to short-rectangular. 7. D. Hilariana. 
Leaf-cells with somewhat thickened walls, the median 2-6 times 
as long as wide, 4-5 » wide. 8. D. Herminieri. 
Seta reddish, rather stout and erect; capsule much contracted under the 
mouth when dry; median leaf-cells 6-7 » wide. 9. D. subinclinate. 
Leaves mostly with acute apex and percurrent or excurrent costa. x 
Leaves squarrose; leaf-blade distinct to the apex. “10. D. reticulata. 
Leaves not squarrose, often secund. 
Seta red. —~ ~ 
Capsule pale, erect, wide-mouthed and mostly tapering to the 
base when dry. 11. D. crispa. 
Capsule dark, more or less curved and nodding to horizontal. 12. D. secunda. 
Seta yellow, or finally becoming reddish. 
Costa of the stem-leaves slightly broader upward to the shoulder 
of the leaf, then tapering to the apex. 13. D. pusilla. 
Costa of the stem-leaves tapering from base to apex. 
Costa smooth on the back toward the apex. 
Annulus present. 
Capsule short-oval to oblong, nodding, not furrowed. 14. D. Perrottetii. 
Capsule oval, erect, furrowed when dry, about 1 mm. 
high. 15. D. Harvisii. 
Annulus lacking; capsule oval-cylindric, about 1.5 mm. ‘ 
high. 16. D. Barnesii. 
Costa rough on the back towards the apex. 17. D. heteromalia. 
TIT. Mricropus 
Peristome-teeth vertically striate on the outer plates. 
Capsule short-oval, more or less nodding and strumose. 18. D. guadelupensis. 
Capsule oblong, symmetric, erect. 
Inner perichaetial leaves narrowed to a limb about as long as the 
clasping base. 2, ;- : —— Ome 19. D. lagunaria. 
Inner perichaetial leaves narrowed to a Gab about twice as long as 
the basal part; spores very rough, 20-24 » in diameter. 20. D. brachyblepharis. 
Inner perichaetial leaves narrowed to a limb 4-6 times as long as 
basal part; spores finely papillose, up to 16 in diameter. 21. D. Dussii. 
Peristome-teeth papillose, without vertical striae. 
Leaves obtuse; costa vanishing in or well below the apex. 
Capsule oval; spores with very large papillae. 22. D. longirostris. 
Capsule spheric; spores with minute papillae. 23. D. sphaerocarpa. 
Leaves acute. . 
Costa percurrent; spores rough with minute papillae. 24, D. barbensis. 
Costa excurrent; spores rough with large papillae. 25. D. alpina. 
Species of uncertain position: ale 
Stems robust, up to 6 cm. high; leaves obtuse, the costa vanishing below > 
apex. 26. D. remotifolia. 
Stems minute, weak, 5 or 6 mm. high; leaves distant, laxly spreading 
from the base. 27. D. Miilleri. 
1, Dicranella Grevilleana (Brid.) Schimp. Coroll. Bryol. 
Eur. 13. 1855. 
Dicranum Schreberi Grevilleanum Brid. Bryol. Univ. 1: 450. 1826. 
Dicranum Grevilleanum B.S.G. Bryol, Eur. (37-40:) Dicranum 19. 1847, 
Plants in soft, green cushions, with mostly simple, erect stems up to 2 cm. high: stem-leaves 
distant, about 1.5 mm. long, from an ovate, loosely clasping base rather abruptly narrowed 
to a flexuous-squarrose, narrow, grooved limb with a narrow blade extending to the slightly 
serrulate apex, the leaf-margin flat and slightly crenulate almost to the base; costa 50-60 u 
wide at the base, scarcely one sixth the width of the leaf-base; leaf-cells distinct, thin-walled, 
rectangular or sometimes rather irregular, the median ones 8-10 wide and two or three 
times as long, the lower ones about 10 » wide and up to 50 uw long; perichaetial leaves up to 4 
mm. long, from an elongate, clasping base abruptly narrowed to a spreading, flexuous, narrow 
limb one and one half times to twice.as long as the clasping part, with the apex denticulate; 
costa more or less excttrrent and below paler and narrower than in the stem-leaves: seta red, 
erect, 8-10 mm. long: capsule short, nodding, curved, slightly strumose and more or less 
