190 The Botanical Gazette. [April, 
are quite unlike those commonly found in the genus. In 
some cases they attain a third the size of the leaves and their 
cells are very like the ordinary leaf-cells of the species. They 
are by no means frequent, occurring on about one out of every 
five stems examined, and it is rare to find more than one of 
two of them on a stem. When they do occur, however, they 
are persistent and may be found by the older, as well as by 
the younger leaves. It is to be hoped that fruiting speci- 
mens of P. Columbiana may soon be collected, as it would be 
of interest to learn whether or not these peculiar underleaves 
take part in the formation of the involucre. 
4. PLAGIOCHILA VIRGINICA Evans in Millspaugh: Flora of 
West Virginia 497. pl. —. 1892. 
Since the publication of this species, I have received from 
Professor Underwood specimens of the same plant, collected 
by himself near Washington, D. C., in 1891. They are 4 
little more robust than those collected by Dr. Millspaugh and 
some of the stems show minute underleaves; otherwise Me 
specimens agree closely. 
tant acuminate lobes; leaf-cells polygonal with thic 
walls and evident trigones; underleaves minute, sub 
; ions; 
inflorescence terminal, subtended by one or two innovatlO®” 
en he 
bracts two, oblong, antical margin reflexed, ene a 
part, margin ise i i ; perianta 
gins otherwise irregularly spinose; peria th ciliate 
shorter than the bracts, broadly obovate, bilabiate wi 
lips, wingless or narrowly winged; ¢ inflorescence not — 
Stems 0.5 to 1.5™ long, 0.12 too.25™" in diameter; lea : 
ire long, 0.4"" wide; leaf-cells in middle of leaves averds 
-023™" in diameter. 
Mixed with Lejeunexz on decaying logs; Ocala, Flos 
L. M. Underwood. Distributed in Hep. Amer. # 1% 
P. Ludoviciana. 
