132 
ALEXANDER W. EVANS 
shallow and very short; cells of lobe averaging lo jjl along the margin, 
i6 X 14 in the median and basal portions, each bearing a conical 
papilla on the dorsal surface, walls slightly thickened at the tips of 
the papillae, otherwise thin throughout; cells of lobule plane; stylus 
none: inflorescence autoicous: 9 inflorescence borne on a somewhat 
elongated branch, innovating on one side, the innovation short and 
Fig. I. CoLOLEjEUNEA CONTRACTILOBA Evans 
A. Part of a plant with male and female inflorescences, ventral view, X 65. 
B. Perianth and bracts, base of innovation at left, ventral view, X 65. C. Cells 
from middle of lobe, X 300. D. Cells of keel, optical section, X 300. E. Apex of 
lobule, ventral view, X 300. F. Apex of lobule, dorsal view, X 300. G, H. Bracts 
from a single involucre, X 65. /. Transverse section of perianth just above middle, 
X 65. /. Gemma, X 300. The figures were all drawn from the type specimen. 
sterile; bracts obliquely spreading, more or less complicate, the lobe 
ovate to ovate-lanceolate, mostly 0.35-0.45 mm. long and 0.12-0.2 
mm. wide, apex, margin and cells as in the leaves, lobule ovate to 
obovate, mostly 0.15-0.2 xo.i mm., rounded to more or less pointed 
at the apex; perianth obovate in outline, about 0.35 mm. long and 
0.25 mm. wide, terete in lower half, five-keeled above, the keels blunt 
below, sharper above, rounded at the apex, beak of perianth short 
but distinct, surface in upper part roughened as in the leaves: in- 
florescence terminal on a more or less abbreviated branch, not pro- 
