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MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 11 



4. Leaf segments acuminate, the tip of 2 cells 39-52 y. or rarely to 78 fi long. 



1. C. eras si folia. 



4. Leaf segments acute with a 1 -celled tip, the cell about 30 fi long. 4. C. media. 



3. Leaf segments more or less straight, the tip 2, more often 3 cells long. 



2. C. subforjicata. 



Leaves obliquely or transversely inserted, not decurrent. 



2. Leaf segments narrowly triangular from a 3- to 4-celled base; leaves subtransversely 

 inserted; plants whitish or rarely tinged with brown. 



3. Leaf tip 2 or 3 cells long. 8. C. dussii. 



3. Leaf tip S or 6 cells long. 9. C. bischlerae. 



2. Leaf segments broadly triangular from a base 6 or more eel's wide (rarely only 4 

 cells wide). 



3. Leaf segments strongly connivent. 4. C. media. 



3. Leaf segments straight or curved but not connivent. 

 4. Plants greenish or whitish; leaves obliquely inserted. 



5. Leaves bifid to one-half their length, the segments mostly 8 or more cells 



long. Plants of the Caribbean and northward. S. C. bicuspidata. 



5. Leaves bifid to about one-third their length, the segments mostly 6 cells 



long. Plants of Patagonia. 7. C. patagonica. 



4. Plants brown, at least in the outer parts. 



5. Leaves more or less complicate-keeled, approximate to imbricate, patent; 

 dorsal and ventral leaf bases strongly convex to cordate; leaf insertion 

 transverse. 11. C. physocaula. 



5. Leaves usually more or less concave, the segments variously spreading or 

 incurved. 



6. Leaf segments broadly triangular, usually ending in a blunt apex, the 

 cells mostly quadrate in outline; leaf insertion oblique. [Plants from 

 Bolivia.] 6. C. grandijolia. 



6. Leaf segments acute; leaf insertion subtransverse. [Plants of Patagonia 

 and Antarctica.] 



7. Leaf segments long, slender, acute to short acuminate with most of 



the cells longer than broad. 10. C. tubidata. 



7. Leaf segments broadly triangular, with most of the cells isodiametric. 



8. Plants tiny; leaves deeply concave cup-shaped. 13. C. cucullifolia. 

 8. Plants larger; leaves often concave but never cup-shaped. 



12. C. badia. 



1. Cephalozia crassifolia (Lindenberg & Gottsche) Fulford, comb. nov. 



Jungermannia crassifolia Lindenberg & Gottsche in G. L. & N. Syn. Hep. 68S. 1847. 

 Blepharostoma sandvicensis Trevisan, Mem. 1st. Lomb. III. 4: 417. 1877. 

 Cephalozia forficata Spruce, On Cephalozia 46. 1882. 



Cephalozia subg. 5 Eucephalozia, forficata Spruce, On Cephalozia 46. 1882. 

 Cephalozia sandvicensis auct. [American plants.] 



Plants small, slender, pale green tinged with brown, in mats or scattered among 

 other bryophytes; stems prostrate, pellucid, 1-1.5 cm long, with leaves 0.5-0.8 mm 

 wide, irregularly branched; branches ventral-intercalary, leafy, often bearing male 

 or female inflorescences. Rhizoids from cells of the ventral side of the stem, the 

 tips branched. Line of leaf insertion nearly longitudinal. Leaves distant to approxi- 

 mate, plane, widely spreading to slightly ascendant, decurrent, suborbicular, 0.4-0.5 

 mm long, 0.3 mm wide, often smaller toward the tip of the stem, the lateral margins 

 convex, bilobed to one-fourth the length, the segments connivent, short, triangular- 

 acuminate, ending in two single cells; cells of the tip 39-52 very rarely to 65 /x 

 long, 13-18 /' wide, cells below the sinus mostly 52-65 X 39-50 (i, with 1 cell often 

 much smaller, the walls uniformly thickened, without trigones, the cuticle smooth. 

 Underleaves absent. Female inflorescence on a short ventral branch with few leaves, 

 the bracts and bracteoles in 3 or 4 series, bifid, the segments triangular, entire. Peri- 

 anth long, cylindrical below, 3-keeled above, the mouth ciliate, the cilia 3 or 4 



