144 



The paucity of Chlorophyceae at lower elevations is striking. 

 Collections made by Mr. Lewis in June and July of 1906 show, 

 however, that the green algae are rather well represented in the 

 moist regions at higher elevations. Eighteen genera were found 

 in the Blue Mountains. Of these, 15 are new to the local flora. 



Cyanophyceae are more common at all elevations than Chloro- 

 phyceae. Of 12 genera collected only 5 are not recorded in Collins' 



list. 



Rhodophyceae were found to be represented in the algal flora 

 of the mountains by Hildejibrandtia rivularis, which occurs on 

 stones in the rapidly running streams of high altitudes. 



Material fixed and preserved for a morphological study of the 

 three species of Trentepohlia. One of these was found to be 

 particularly subject to attacks by parasitic fungi. Three species 

 of fungi growing on the Trentepohlia appear to form simple 

 lichens. Material was preserved for further study of the incipient 

 lichens. 



TWO NEW SPECIES OF COMOCLADIA 

 COLLECTED IN JAMAICA.* 



By DR. N. L. BRITTON, Director-in-Chief, New York 



Botanical Gardens. 



Comocladia cordata (sp. nov.) A tree, about 1 5 m. high, glabrous 

 throughout. Leaves about 2 dm. long ; leaflets about 13, ovate to 

 oblong-lanceolate, firm in texture, dull green, slightly paler beneath 

 than above, strictly sessile, entire-margined, cordate at the base, 

 acute or short-acuminate at the apex, 5-9 cm. long, 2.5-4 cm - wide, 

 the veins diverging from the midvein at nearly right angles and 

 curving upward ; lower leaflets smaller than the upper ones, the 

 pairs distant ; panicles as long as the leaves or shorter, about 8 cm. 

 broad, their branches very slender ; flowers numerous, purple, 

 1.5 mm. wide ; pedicels filiform, 1-3 mm. long. 



Rocky wooded hill, Troy (Britton 640), [Harris 9416]. Nearest 

 to C. integrifolia, Jacq. 



Comocladia vehitina (sp. nov.) A tree, 6 or 7 m. high, the young 

 twigs, foliage and panicles densely brown-velutinous. Leaves 

 about 2 dm. long ; leaflets about 13, oblong, rather firm in texture, 

 paler beneath than above, blunt and rounded at the apex, truncate 

 or subcordate at the base, slightly repand on the margin, 2-7 cm. 

 long, 4 cm. wide or less, very shortly petioluled, the lower pairs 

 much smaller than the upper ; petiolules 2 mm. long ; panicles as 

 long as the leaves or shorter, the branches slender ; flowers dull 

 crimson ; fruits oblong, very shortly stalked, I cm. long, 6 or 7 mm. 

 in diameter. 



Great Goat Island (Harris 9208). Perhaps nearest related to 

 C. pubescens, Engler. 



* From "Torreya", Vol. 7, No. I, Jan. 1907. 



