332 Alexander W. Evans, 



no dissections were made, it is possible that the female branches 

 may have borne undetected perigonial bracts at the base. All the 

 other specimens which have been examined with special reference 

 to the inflorescence have proved themselves either autoicous or 

 paroicous. It is i)robable therefore that the inflorescence ought 

 to be described as heteroicous, in which case the male individuals 

 described by Gottsche may have been due to an unfavorable envi- 

 ronment. Apparently a paroicous inflorescence is associated with 

 marked xerophytism. 



The female branch (Fig. 9, A) is very short and seems to be in- 

 variably simple. Sometimes it arises directly from a principal 

 axis, sometimes from a primary branch. The perichaetical bracts 

 and bracteoles have been well described by Spruce. They are 

 exceedingly variable but always show a high degree of coalescence 

 (Fig. 9, F— H). The bracts, however, are completely free at the 

 antical base. When well developed the lobes of the innermost 

 bracts are about 1.5 mm. long and 0.9 mm. wide; they show an ovate 

 form, a rounded to obtuse apex, and an entire or sinuate margin. 

 The lobules are about as long and almost as wide but they taper 

 more toward the apex, which varies from obtuse to acute. The 

 lobules are usually so strongly convolute that they appear nar- 

 rower than they really are. The stylus is commonly represented 

 by a slender tooth-like process on the inner edge of the lobule but 

 it may be in the form of a rounded lobe near the base. The inner- 

 most bracteole is about 1.5 mm. long and 0.6 mm. wide and is bifid 

 one tenth to one fifth its length. The divisions are erect and more 

 or less sharp-pointed, and the sinus is narrow and usually acute. 

 The lateral margins of the bracteole are sometimes entire and 

 sometimes bear one or two teeth, lobes, or laciniae on each side. 

 The divisions of the bracteole are often further distinguished by 

 being canaliculate or irregularly revolute in various portions of 

 the margin. The remaining bracts and bracteoles show a greater 

 approach to ordinary leaves and underleaves. In the case of a 

 paroicous inflorescence the perigonial bracts (Fig. 9, H) are much 

 like the perichaetial bracts except that the parts are smaller, the 

 lobes are saccate at the base, and the coalescence is much less exten- 

 sive. In the case of a purely male inflorescence the bracts are 

 much the same as in other species of Chnnanthelia. 



The perianth is of the normal type and shows two sharp lateral 

 keels, two sharp postical keels, and a grooved antical face (Fig. 9, A, I). 

 It measures about 2 mm. in length and 0.9 mm, in width and tapers 

 gradually to the apex, which is tipped with a long and slender 



