42 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 11 



5. Leaves with a long, decurrent, dorsal line of insertion 2. I. ulcana. 



5. Leaves with a short dorsal line of insertion; cilia long, slender, abundant, 



tending to be parallel to the stem. 1. T. tomentosa 



3. Leaf lamina at least half as high as wide, mostly five or more cells high. 



4. Lamina of the leaf with scattered superficial cilia. 9. T. argentea. 



4. Lamina of the leaf without superficial cilia. 



5. Some of the divisions of the leaf-segments recurved. 6. T. clcgans. 



5. None of the divisions of the leaf segments recurved. 



6. Lamina of the leaf 8 to 14 cells high, not distinctly wider than high. 



7. T. brevifissa. 



6. Lamina of the leaf five or six cells high, distinctly wider than high. 



7. Plants of small to medium size; leaves divided to two-thirds of their 

 length into four or five mostly sparsely ciliate segments; leaves never 

 decurrent. 8. T. flaceida. 



7. Plants of medium to large size; leaves divided to one-half of their 

 length into five or six densely ciliate segments; leaves often a little 

 decurrent. 3. T. eUiottii. 



1. Trichocolea tomentosa (Swartz) Gottsche, Mexikanske Levermosser lift. 

 1863. (Danske Vid. Selsk. Skr. V. Naturr. Math. 6: 215. 1867.) 



Jungermannia tomentosa Swartz, Prod. 145. 1788. 



Basichiton tomentosum Trevisan, Mem. 1st. Lomb. III. 4: 394. 1877. 



Leiomitra sphagnoides Spruce, Trans. Proc. Bot. Soc. Edinb. 15: 350. 1885. 



Trichocolea sphagnoides Stephani, Trans. Linn. Soc. II. Bot. 6: 99. 1901. 



Leiomitra crista-castensis Spruce ms. Hepat. Sprue. 



Trichocolea mexicana Stephani, Spec. Hep. 4: 54. 1909. 



Trichocolea grandifolia Stephani, Spec. Hep. 4: 55. 1909. 



Trichocolea cristacastrensis Stephani, Spec. Hep. 4: 59. 1909. 



Trichocolea allioni Stephani, Spec. Hep. 6: 372. 1924. 



Trichocolea pterophylla Herzog, Hedwigia 67: 250. 1927. 



Plants long, large, in pale greenish-yellow tufts ; stems stout, 10-20 cm long, 

 with leaves to 1.5 mm wide, pinnate or rarely bipinnate, the branches mostly 

 1 cm long, becoming recurved above; stems in transverse section 21-26 cells 

 across, the cortex of smaller cells in one or two layers; stem paraphyllia absent. 

 Line of leaf insertion oblique, the dorsal part short, the leaves succubous. Leaves 

 appressed, closely imbricate, asymmetric, to 1 mm long, 1-4 mm wide, divided 

 to near the base into five to eight unequal, often divided, ciliate segments; 

 lamina one to three cells high, the cells of the dorsal part 31 X 35 those of 

 the ventral half 73 X 12 ; segments often branched, narrowly triangular, 

 densely ciliate with great numbers of long, simple or branched cilia tending to 

 be parallel to the stem, the cells long, the cuticle striolate-papillose. Underleaves 

 symmetric, half as wide as the leaves, bifid nearly to the base, the halves again 

 divided, forming usually four often branched segments, ciliate as in the leaf. 

 Plants dioieous. Male inflorescence intercalary on a branch, the bracts and 

 bracteoles in six or more series, the bracts similar to the leaves but concave and 



Fig. 1. Trichocolea tomentosa. 1 a. Stem leaf, X 55. 1 b. Stem showing leaf inser- 

 tion, X 10- 1 c. Portion of one of the cilia, X 235. 1 d. Stem underleaf , X 55. 1. e. Por- 

 tion of a transverse section of a stem, X 235. 1 f. Habit of the plant; G, female inflorescence. 

 1 g. Longitudinal section through the tip of a female stem on which a sporophyte has de- 

 veloped, X 10; A, foot of sporophyte; B, three female bracts; K, shoot-calyptra; P, perianth, 

 covered with paraphyllia; S, seta of the sporophyte. 



Fig. 2. T. uleana. 2 a. Stem leaf, X 55. 2 b. Stem showing leaf insertion, dorsal 

 view, X 12. 2 c. Portion of one of the cilia of a leaf, X 235. 2 d. Stem underleaf, X 55. 



Fig 3. T. elliottii. 3 a. Stem leaf, X 55. 3 b. Stem showing leaf insertion, dorsal 

 view, X 15. 3 c. Portion of one of the cilia of a leaf, X 235. 3 d. Stem underleaf, X 55. 

 3 e. Male bracteole showing tuft of rhizoids with expanded tips, X 55. 



Drawn from Hatcher, 1957, 1959. 



