168 LEJEUNEAE OF THE UNITED STATES AND CANADA 
out clearly the marginal teeth of the lobule is that of Stephani, 
illustrating a luxuriant form from Portugal. All the other figures 
seem to have been drawn from imperfectly developed material. ۱ 
. Although Lindberg recognized Zejeunea parvula as a distinct 
species he failed to give a complete description of it. He stated 
merely that it agreed with Z. minutissima in being autoicous and in 
having no underleaves but that it differed in its spreading, semioval 
and plane lobules. These slight differences by themselves in 0 
variable an organ as the lobule are hardly sufficient to separate the 
two species. Lindberg referred to / . parvula the specimens distrib- — 
uted by Drummond as Jungermannia parvula and those distributed 
by Sullivant as Z. minutissima. . The writer has examined both and 
finds that the material is not only fragmentary but badly weather- ， 
worn. It is sufficient, however, to indicate that the specimens are 
the same as that rather common species of the Southern States, 
which subsequent writers have referred, without question, to Z. 
minutissima. There seems to be no reason, therefore, for 8 E 
to hold Z. parvula distinct. It should perhaps be noted that x 
sometimes, in American specimens, the lobe is more narrowed at 
the apex and less crenulate than in European plants. Both 
these very slight differences, however, are inconstant. American 
specimens in which the lobes are just as blunt and just as crenu- — | 
late as in normal European forms are also frequent, and intermediate 
conditions exist between the two extremes. 
c minutissima is our smallest Cololejeunea. It can easily be 
distinguished from our other three species by its relatively larger s 
lobule and extremely rudimentary stylus. From C. Jooriama, . 
with which it sometimes grows, it differs also in its autoicous in- - . 
florescence, in its total lack of hyaline cells, in the shape and iñ — 
the distinctly crenulate margin of its leaf-lobes. | 
EEE NL 
EE 4 
Re 
21. Cololejeunea Biddlecomiae (Aust.) EC 
Lejeunea calcarea Sull. Muse. Alleg. 275. 1845. Not Libert. 
Lejeunea echinata Aust. Hep. Bor.-Amer. 99. 1873. NOE. 
Taylor. 
E Lejeunea Biddlecomiae Aust.; Pearson, List of Canadian Hepa- 
ticae, 5. pl. 5. 1890, oe 
e ET MEE EU 
* Hedwigia, 26 : Pl. 1. f. 2. 1887. 
