Cannabis. CXXX. URTICACli:^. 511 



ing in shades, smooth and shining. Leaves on long petioles, especially the 

 lower ones, smooth ish, about '2' long and J as wide. Flowers in sliort heads 

 or corymbs, axillary. A species without .stings. Aug., Sept. 



5. U. uiiKNs. Burn'in<: or Dwarf Ndllc. 



Lvs. broadly elliptic, about 5-veined, acutely serrate; clusters glomerate, 

 by pairs. — (T) Weed, in cultivated grounds. Stem 12 — 20' high, hispid with 

 venomous stings, branching. Leaves 1 — 2' long, f as broad, on short petioles 

 and with large serratures. Stipules small, lanceolate, refle.xed. 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. GRACILIS. Ait. Slender Nellie. 



St. erect, strict, sparingly hispid; Irr.. ovate-lanceolate, subacuminate, 

 coarsely and .somewhat doubly serrate, 3-veined, smoothish above, hispid be- 

 neath on the veins; .ynkcs elongated, pinnately branched, a little shorter than 

 the leaves ; Jls. glomerate. — % Northern and Western States, and Brit. Am. 

 Stem 2 — 3f high. Flowers minute, green. July, Aug. 



6. BCEHMERIA. Willd. 



Named for G. F. Bcchmer, a German botanist. 



Flowers c? or cT 9. — c^ Calyx 4-parted, with lanceolate, acute seg- 

 ments ; stamens 4. 9 achlamydeous ; ovary and style I, in the axil 

 of a bract ; achenium compressed, margined. — Herbs or shrubs, nearly 

 allied to Urtica. Lvs. opposite or alternate, Fls. clustered. 



B. cYMNDRiCA. (Urtica cylindrica and capitata. Limi.) False Nellie. 

 Herbaceous; lvs. opposite, ovate-lanceolate, acuminate, dentate, smooth; 

 Jls. (^ <^ ] sterile spikes glomerate, interrupted, /c/V/7c cylindric. — A coarse, nettle- 

 like plant, in swamps and bottoms, Mid. and Western States ! Stem slender, 

 obtusely 4-angled, channeled on each side, 2 — St" high. Leaves 3-veined, 3 — 5' 

 long, i as wide, on long petioles. Flowers minute, the I'ertile ones in axillary, 

 cylindric spikes, 1 — 2' in length, the barren spikes rather longer and more 

 slender. July, Aug. 



/?. Spikes shorter, subcapitate ; petioles somewhat shorter. 



y, (B. lateriflora. Muhl.) Lvs. roughish; spikes longer a.nd much interrupted. 



7. PARIETARIA. 



Lat. paries, a wall ; some of the species prefer to grow on old walls, &c. 



Flowers monoecious-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 Jiowers axillary. 

 P. Penxsylvanica. Pellitory. 



Lvs. oblong-lanceolate, veiny, tapering to an obtuse point, punctate with 

 opaque dots; i/ivot. longer than the flowers.—® A rough, pubescent herb, found 

 in damp, rocky places, Vt., N. Y., W. to Wise. ! &c. Stem erect, simple or 

 sparingly branched, 6—12' high. Leaves alternate, entire, hairy and rough, 

 about i''wide and 3 or 4 times as long, petiolate, and ending with an obtuse 

 acumiriation. Segments of the involucre about 3, lance-linear. Flowers dense, 

 greenish and reddish-white. Rare. June. 



Section 3. CANXABINE.E. 

 Herbs, erect or twining, with a watery juice. J" racemose or panicu- 

 late, 9 in a cone-like anient. Albumen 0. 

 8. CANNABIS. 



Arabic gane.h, hemp. 



Flowers J^ 9. — 6" Calyx 5-parted. 9 Calyx entire, oblong-acumi- 

 nate, opening longitudinally at the side ; sty. 2 ; ach. ? 2-valved, en- 



