316 CANNABINACEA:. 



pie or branched from the base, succulent and almost transparent. Leaves oppo- 

 site, broad-ovate or ovate-lanceolate, acuminate, crenate-serrate, shining, on 

 petioles which are 1 2 inches long. Flowers very small, greenish, in axillary 

 branching clusters or paniculate corymbs, which are shorter than the petioles. 

 Very properly separated from the genus Urtica. Richweed. Coolweed. 



3. BCEHMERIA. Jacq. False Nettle. 

 (.Named after George Rudolph Boehmer, a German Botanist.) 



Flowers monoecious or dioecious, minute. STERILE FL. Pe- 

 rianth 4-parted. Stamens 4. FERTILE FL. Perianth none, 

 but a cluster of ovate acuminate scales, with a compressed 

 ovary within each scale. Nut ovate, pointed with the subulate 

 style. 



13. cylindrica Willd. : herbaceous ; leaves opposite, ovate-oblong, acu- 

 minate, toothed, 3-nerved, on long petioles, smoothish ; sterile spikes inter- 

 rupted; fertile ones mostly continuous, cylindric. B. latcrifiora MvM. 

 Urtica cylindrica Linn. 



Wet grounds. Can. to Flor. June Aug. %. Stem 2 3 feet high, smooth- 

 ish, usually simple, obtusely 4-angled. Flowers minute, greenish, often dioecious, 

 in slender mostly leafy spikes. False Nettie. 



4. PARIETARIA. Linn. Pellitory. 

 (From the Latin paries, a watt ; the species often growing on old walls.) 



Flowers polygamous, surrounded by a many-cleft involucre. 

 PERFECT FL. Perianth 4-parted, persistent. Stamens 4 ; fila- 

 ments at first incurved, then expanding with an elastic force. 

 Ovary 1. Style 1. Nut enclosed by the enlarged perianth. 



P. Pennsylvania Muhl. : leaves alternate, oblong-lanceolate, veiny, 

 with opaque dots ; involucre longer than the flowers. 



Moist rocks. N. Y. to Geor. June. (J). Stem 6 12 inches high, simple. 

 Flowers mostly perfect, in compact axillary clusters, whitish, at length brown. 



Pennsylvanian Pellitory. 



ORDER CXII. CANNABINACE^E. HEMPWORTS. 



Flowery dioecious. STERILE FL. in racemes or panicles. Pe- 

 rianth 5-parted, herbaceous, scaly, imbricated. Stamens few. 

 FERTILE FL. in spikes or cones. Perianth single, inwrapping 

 the ovary. Stigmas 2, subulate, sessile. Fruit indehiscent, 

 with a single seed. Embryo curved, without albumen. Her- 

 baceous rough-stemmed watery plants, with alternate lobed stip- 

 ulate leaves, and small inconspicuous flowers. 



1. CANNABIS. Linn. Hemp. 

 (An ancient Greek name, the etymology of which is obscure.) 



Dioecious. STERILE FL. Perianth 5-parted. Stamens 5. 



