— 26 — 



both of these species the leaf-cells are somewhat smaller, averaging about iSyu 

 in the middle of the lobe, the walls show no local thickenings whatever, and the 

 gemmae are larger and more complex. C. minutissima is further distinguished 

 by its convex, more distant, smaller and relatively broader leaf-lobes, by its 

 larger lobules, and by the distinctly and regularly crenulate margins of its leaves 

 and bracts. In C. setiloba the remarkable lobules ,each a long and slender 

 tooth, afford excellent differential characters. The other Florida species would 

 hardly be confused with C. suhcristata. C. Biddlecomiae (Aust.) Evans and C. 

 tuherculata are both distinguished by their roughened leaves and perianths, while 

 C. diaphana Evans is a much more delicate species with narrower and more 

 pointed leaves, the elongated cells of which are almost or quite destitute of tri- 

 gones. 



9. Leptolejeunea elliptica (Lehm. & Lindenb.) Schiffn. 



Collected in January, 19 16, on the leaves of various plants, on Royal Palm 

 Hammock, Dade County, Florida, by J. K. Small & R. L. Lowe (Nos. 7024, 

 7036, 7041, 7042); also in February, 1916, at the same locality, by J. K. Small 

 (Nos. 7045-7047, 7050-7058, 7060-7062); also in January, 19 16, on Long Key 

 Hammock, by J. K. Small (No. 7063). Genus and species new to the United 

 States. In some of the packets listed the species is abundantly represented, 

 in others traces only are present. Although it is not possible to give a complete 

 list of the plants upon which the Leptolejeunea was found, the following partial 

 list may be of interest: Anacheilium cochleatum (L.) Hoft'mgg. (No. 7045), Auliza 

 nocturna (L.) Small (No. 7046). Calyptranthes Zuzygium (L.) Sw. (No. 7060), 

 Chrysohalanus Icaco L. (Nos. 7041, 7055), Encyclia tampensis (Lindb.) Small 

 (No. 7050). Guettarda scahra Vent. (No. 7054), Hippocratea voluhilis L. (No. 7036), 

 Icacorea paniculata (Nutt.) Sudw. (No. 7062), Ilex Krugiana Loesener (No. 7025), 

 Laurocerasus myrtifolia (L.) Britton (No. 7051), Ocotea Cateshyana (Michx.) 

 Sarg. (No. 7056), Psychotria undata Jacq. (No. 7057), Schoepfia chrysophylloides 

 (A. Rich.) Planch. (No. 7058), Simaruha glauca DC. (No. 7061), Spathiger rigida 

 (Jacq.) Small (No. 7047), Zamia pumila L. (No. 7053). 



The discovery of this widely distributed tropical species in Florida is of 

 noteworthy. Although almost always epiphyllous in habit, the plants some- 

 times grow on bark. The blunt leaf-lobes with ocelli in a median row, the distant 

 underleaves with setaceous divisions, the five-keeled perianth with the smooth 

 keels projecting upw^ard as acute or truncate horns, and the specialized caducous 

 branches will serve to characterize the species. For a full description, with 

 figures, reference may be made to an earlier paper of the writer.^ 



10. Leucolejeunea clypeata (Schwein.) Evans. 



Collected in April, 1915, at Monticello, Florida, by E. Nelson (No. i). The 

 species is widely distributed in the eastern United States, but this is apparently 

 the first record for Florida. It represents the fourth species of Leucolejeunea 

 and the thirty-eighth member of the Lejeuneae to be definitely reported from 



1 Bull. Torrey Club 39: 499. pi. 23, f. 1-7. 1902. 



