192 The Botanical Gazette. [April 
sertularioides Michx.), upon which ‘he had discovered peri- 
anths. I have failed to find these organs in any of the mate- 
rial at my disposal, so I add the following description from 
Gottsche’s notes: ‘‘perianthio ovato-cylindrico semi exseflo 
non alato, ore rotundo compresso, labiis dentatis; foliis invol- 
ucralibus conformibus, appressis.” Some of our forms differ 
considerably from Sullivant’s specimens, which we must re 
gard as the type of the species; but no good lines of distinc- 
tion can be drawn between them, as intermediate forms als 
occur. 
former differs in its pale, dull color, in its broader leaves bi 
shorter and more inconspicuous teeth and its slightly pee 
leaf-cells; the latter in the shape of its more obliquely wget 
ing leaves and in its leaf-cells which have thicker walls 9 
better developed trigones. 2 
7- PLAGIOCHILA LUDOVICIANA Sull. Musci Alleg. "I , 
1845: Amer. Journ. Sci. and Arts II. 1: 73. 1846— 
XVI. figs. 4-12, 
Stems 2 to 4™ long, 0.2 to 0.3™™ in diameter; igh ue 
long, 1.2™ wide; leaf-cells with slightly thickened walls ing 
well developed trigones, in the middle of the leaf avers! 
0.029™ in length by 0.021™ in width. 
In this species the underleaves are of two forms: ! 
they are of delicate texture and are deeply split inte:# 
laciniz; in the other, they are leaf-like in texture 4m 
a 
flores 
cence. Many of the plants examined reproduced atid 
vegetatively by means of the propagula, which hav 
