216 Evans: HEPATICAE OF PUERTO RICO 
British Museum and was referred by Stephani to his D. armatiloba,* 
a species that requires further study. It was based] on sterile 
specimens from Guadeloupe and was regarded by Gottsche asa 
variety of D. pellucida. Unfortunately the type has not been 
accessible, but a specimen in the British Museum, collected by 
Elliott at Trois Pitons, Dominica (1754), and determined by Ste- 
phani, coincides closely with the original description. This plant 
has a dioicous inflorescence and is very much like the variety 
malleiformis, the apical tooth of the lobule being even more 
definitely t-shaped. The underleaves, however, have rounded or 
obtuse divisions, which spread obliquely. 
Diplasiolejeunea brachyclada sp. nov. 
Pale green or yellowish, scattered or in depressed mats: stems 
0.1 mm. in diameter, sparingly and irregularly pinnate, the branches 
widely spreading, similar to the stem: leaves loosely imbri- 
cated, the lobe obliquely to widely spreading, not appressed to the 
substratum, plane or more or less squarrose in the antical portion, 
broadly ovate, 1.25-1.5 mm. long, I-1.1 mm. wide, when well 
developed, antical margin rounded at the base and extending 
across the axis, outwardly curved to the apex, postical margin 
straight or slightly curved, forming a very obtuse angle at the 
junction with the keel; lobule ovate, 0.7 mm. long, 0.3 mm. wide, 
inflated throughout, keel arched, free margin involute at least neat 
the base, apical tooth obliquely spreading, acute, truncate or t- 
shaped, mostly three or four cells long and two cells wide at the 
base, proximal tooth sometimes inflexed, shorter than the ap! 
tooth and acute, hyaline papilla distal in position; cells of lobe 
averaging about 12y at the margin, 27 X 18 in the middle, am 
38 X 20u at the base, the walls thickened uniformly: underleavés 
distant, rounded to subcordate at the base, broadly cuneate, 
averaging about 0.17 mm. in length and 0.6 mm. in width, deeply 
n 
borne on a very short branch, a single leaf and a single unde 
being present in addition to the involucral leaves and perianth, 
the innovation usually simple and sterile, rarely bearing a secon 
female flower; bracts obliquely spreading, sharply complicate but 
not winged along the keel, bifid about one fourth, the lobule often 
a little longer than the lobe, the latter oblong, 0.5 mm. long, 0-1 
mm. wide, rounded at the apex, entire or vaguely and sparing? 
* Hedwigia 35: 80. 1806. 
