534 URTICACEAE. 
1. Boehmeria cylindrica (L.) Willd. 
False Nettle. (Fig. 1269.) 
Urtica cylindrica 1,. Sp. Pl. 1396. _ 1753. 
Boehmeria cylindrica Willd, Sp. Pl. 4: 340. 1805. 
A perennial rough pubescent or nearly smooth 
and glabrous erect branching herb, 1°-3° tall. 
Stem stiff; leaves ovate, ovate-oblong or ovate-lan- 
ceolate, thin, slender-petioled, opposite, or some al- 
ternate, coarsely dentate, 1/-3/ long, %4/-114’ wide; 
petioles shorter than the blades; stipules lanceo- 
late-subulate, distinct; flowers dioecious or androgy- 
nous; staminate spikes usually interrupted, the pis- 
tillate mostly continuous, 4/’-114’ long; achene 
ovate-oval, acute, rather less than 1’’ long. 
In moist soil, Quebec and Ontario to Minnesota, 
south to Florida and Kansas. July-Sept. 
Boehmeria cylindrica scabra Porter, Bull. Torr. Club, 
16: 21. 1889. 
Leaves firm, rough above, tomentose beneath, short- 
petioled or nearly sessile, usually reflexed; fruiting 
spikes much longer than the petioles. Pennsylvania, 
New Jersey, and southern New York. 
5. PARIETARIA JL. Sp. Pl. 1052. 1753. 
Annual or perennial stingless diffuse or erect herbs, with alternate entire 3-nerved per- 
tioled leaves, no stipules, and axillary glomerate polygamous flowers, involucrate by leafy 
bracts. Calyx of the staminate flowers 4-parted or of 4 (rarely 3) distinct sepals. Fertile 
flowers with a tubular or campanulate 4-lobed calyx investing the ovary, a short or slender 
style, and a penicillate stigma. Achene enclosed by the withering-persistent pistillate 
calyx. [Ancient Latin, referring to the growth of some species on walls. ] 
About 7 species, widely distributed; besides the following, another occurs in the southern 
United States. ; 
1. Parietaria Pennsylvanica Muhl. 
“Pennsylvania Pellitory. (Fig. 1270.) 
Parietaria Pennsylvanica Muhl.; Willd. Sp. Pl. 4: 
955. 1806 
Annual, pubescent, stem weak, simple or spar- 
ingly branched, ascending or reclining, very slen- 
der, 4’-15’ long. Leaves lanceolate or oblong- 
lanceolate, membranous, dotted, acuminate at the 
apex, narrowed at the base, 3-nerved and with 1-3 
pairs of weaker veins above, slender-petioled, 1/—3/ 
long, 4’—%4’ wide; petioles {’—1’ long, almost fili- 
form; flowers glomerate in all except the lowest 
axils, the clusters shorter than the petioles; bracts 
of the involucre linear, 2-3 times as long as the 
flowers; style almost none; achene about 14’/ long. 
On dry rocks and banks, Ontario to British Colum- 
bia, south to Florida, Colorado and Mexico. June-Aug. 
Family 11. LORANTHACEAE D. Don, Prodr. Fl. Nepal. 142. 1825. 
MISTLETOE FAMILY. 
Parasitic green shrubs or herbs, containing chlorophyll, growing on woody 
plants and absorbing food from their sap through specialized roots called haus- 
toria (a few tropical species terrestrial). Leaves in the following genera oppo- 
site, in Razoumofskva reduced to opposite scales. Flowers regular, terminal or 
axillary, clustered or solitary, dioecious or monoecious, and perianth simple, or 
in some exotic genera perfect, and with perianth of both calyx and corolla. 
Calyx-tube adnate to the ovary, its limb entire, toothed or lobed. Stamens 2-6; 
anthers 2-celled or confluently 1-celled. Ovary solitary, erect; style simple or 
none; stigma terminal, undivided, obtuse. Fruit a berry. Seed solitary, its 
testa indistinguishable from the endosperm, which is usually copious and fleshy; 
embryo terete or angled. 
