132 



ALEXANDER W. EVANS 



shallow and very short; cells of lobe averaging lo /x along the margin, 

 i6 X 14 ju 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. J. 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: d^ in- 

 florescence terminal on a more or less abbreviated branch, not pro- 



