MONOECIA TRIANDRIA. 
567 
brevibus, subulato-ensi- 
formibus, nervosis; ca- 
pitulo convexo; squa- 
mis involucri suborbi- 
culatis. 
leaves short, subulate- 
ensiform, nerved; head 
convex; scales of the 
involucrum nearly or- 
bicular. 
Mich. 2. p. 166 . Pursh, 1. p. 92. Nutt. 1. p. 90. 
Perennial. Leaves one to two inches long, subulate, nerved, somewhat 
pellucid, sprinkled with a few hairs, and showing very distinctly between 
the nerves the numerous transverse partitions which are common in this ge- 
nus. Scape three to four inches high, furrowed, nearly glabrous. Scales 
of the involucrum thin, scarious, nearly orbiculate; of the disk linear-lance- 
olate. Style one. Stigmas two. Capsules two, united, (didymous.) 
Grows in inundated soils. Pursh. In Carolina. Mich. Pursh. I have 
not met with this species in the low country of Carolina. 
Flowers — 
ALNUS. 
Masculi amentum re- 
ceptaculis cuneiformi- 
bus, truncatis, trifloris 
compositum. Calyx 
squama. Corolla qua- 
dripartita. 
Foeminei amentum. 
Calycis squamae biflo- 
rae. Corolla 0. Semi- 
na compressa, ovata, 
nuda. 
1. Serrulata. Aiton. 
A. foliis obovatis, 
acuminatis, venis et ax- 
illis venarum subtus 
pilosis; stipulis ellipti- 
cis, obtusis. 
Willd. 
Sterile Jlorets. A- 
ment, with the recepta- 
cles cuneiform, trun- 
cate, 3-flowered, com- 
pound. Calyx a scale. 
Corolla 4-parted. 
Fertile Jlorets. A- 
mentum. Scales of the 
calyx 2-flowered. Co- 
rolla 0. Seed compres- 
sed, ovate, naked. 
Leaves obovate, a- 
cuminate, with the 
veins and axils of the 
veins on the under sur- 
face hairy; stipules el- 
liptic, obtuse. 
