_ Cannas. CXXX. URTICACKE. ll 
_ ing in shades, smooth and shining. Leaves on long petioles, especially the 
_ lower ones, smoothish, about 2’ long and 3 as wide. Flowers in short heads 
_ or corymbs, axillary. A species without stings. Aug., Sept. 
5. U. urens. Burning or Dwarf Nettle. : 
Ivs. broadly elliptic, about 5-veined, acutely serrate ; clusters glomerate, 
_ by pairs.—@ Weed, in cultivated grounds. Stem 12—20/ high, hispid with 
venomous stings, branching. Leaves 1—2’ long, 3 as broad, on short petioles 
and with large serratures. Stipules small, lanceolate, reflexed. Flowers in’ 
drooping, pedunculate clusters about as long as the petioles, both the sterile and 
fertile in the same axil. Rare. June, July. § 
6. S. Graciuis. Ait. Slender Nettle. 
St. erect, strict, sparingly hispid; Jvs. ovate-lanceolate, subacuminate, 
coarsely and somewhat doubly serrate, 3-veined, smoothish above, hispid be- 
neath on the veins; spikes elongated, pinnately branched, a little shorter than 
the leaves; fls. glomerate.—2| Northern and Western States, and Brit. Am. 
Stem 2—3f high. Flowers minute, green. July, Aug. 
6. BH AMERIA. Willd. 
Named for G. F. Boehmer, a German botanist. 
Flowers £ or 3 2.—c Calyx 4-parted, with lanceolate, acute seg- 
ments; stamens 4. @ achlamydeous; ovary and style 1, in the axil 
of a bract ; achenium compressed, margined.— Herbs or shrubs, nearly 
_ allied to Urtica. Lvs. opposite or alternate. Fils. clustered. 
B. cyninprica. (Urtica cylindrica and capitata. Linn.) False Netile. 
Herbaceous ; lvs. opposite, ovate-lanceolate, acuminate, dentate, smooth; 
jis. 3 Q ; sterile spikes glomerate, interrupted, fertile cylindric.—A coarse, nettle- 
like plant, in swamps and bottoms, Mid. and Western States! Stem slender, 
obtusely 4-angled, channeled on each side, 2—3f high. Leaves 3-veined, 3—5/ 
long, 4 as wide, on long petioles. Flowers minute, the fertile ones in axillary, 
cylindric spikes, 1—2’ in length, the barren spikes rather longer and more 
slender. July, Aug. - SNe ee 
8. Spikes shorter, subcapitate ; petioles somewhat shorter. 
y- (B. lateriflora. Muhl.) Lvs. roughish ; spikes longer and much interrupted. 
7, PARIETARIA. 
Lat. paries, a wall; some of the species prefer to grow on old walls, &c. 
Flowers moneecious-polygamous, in clusters surrounded by a many- 
cleft involucre ; calyx 4-parted; stamens 4, at first incurved, then 
expanding with an elastic force; ovary and style 1; achenium pol- 
ished, enclosed within the persistent calyx. Herbs with usually al- 
ternate leaves. Clusters of green flowers axillary. 
P. Pennsytvanica. — Pellitory. , 
Lvs. oblong-lanceolate, veiny, tapering to an obtuse point, punctate with 
opaque dots ; zmvol. longer than the flowers.—q@) A rough, pubescent herb, found 
in damp, rocky places, Vt., N. Y., W. to Wisc.! &c. Stem erect, simple or 
sparingly branched, 6—12’ high. Leaves alternate, entire, hairy and rough, 
about 3’ wide and 3 or 4 times as long, petiolate, and ending with an obtuse 
acumination. Segments of the involucré about 3, lance-linear. Flowers dense, 
greenish and reddish-white. Rare. June. 
SecTion 3. CANNABINEZ. 
Herbs, erect or twining, with a watery juice. d' racemose or panicu- 
late, 2 in a cone-like ament. Albumen 0. 
8. CANNABIS. 
Arabic ganeb, hemp. 
Flowers J 9.—c& Calyx 5-parted. Q Calyx entire, oblong-acumi- 
nate, opening longitudinally at the side; sty. 2; ach.? 2-valved, en- 
