PARrETARIA 
.- — TJRTICA 
295 
1. Parietahia. F1. polygamous, suiTouiided by an involucre. 
Perianth bellsliapea, 4-parted. Stam. 4. Style filiform. 
■ 2. Uetica. F1. monoecious or dioecious. Males in loose 
racemes ; perianth 4-parted ; stam. 4. Females in capitate 
racemes ; perianth 2-pai'ted ; stigma sessile. 
3. HtTMULUS. Fl. dicBcious. Males with the perianth 5- 
parted ; stam. 5. Females ^vith the perianth scalelike, open, 
hidden by the scales of an oval catkin ; stigmas 2, Ipng- 
1. Parieta'ria Linn. Wall Pellitory. 
1. P. diffusa (Koch) ; 1. elliptic or ellipti'e-lfiuceolate 3-veined 
above the base, bracts combined into an involucre of two 3-lobed 
segm., perianth bellshaped equalling the stam. or in the perfect 
11. (red) lengthening to twice as long as the stamens. — E. B. 879. 
Curt. ii. 203. — St. prostrate or ascending, simple or branched 
below. Cymes axillary, dense; primary fern. fl. between the 
inv.-segni. and with 1 or 2 free bracts ; each segm. bears on its 
face 1 or 3 fl., of which the lateral have bracts. — Old walls- P. 
VI.— IX. E. S. I. 
[My P. erecta is a form of P. diffusa. The true plant of Koch 
has no inv., but a regular cj'me with fi-ee bracts and no lenglh- 
ening flower. It is not known to be a native plant.] 
2. IJrti'ca Linn. Nettle. 
Jl. V.pihdifera (L.) ; I. opposite ovate ovate-lanceolate or 
cordate-acuminate coarsely toothed, clusters of fr. globose stalked. 
— E. B. 148. About 2 ft. high. Very venomous. — jS. U. I)o- 
daHii (X,.); 1. ovate or ovate-lanceolate nearly entire. — About 
towns and villages in the East of England. A. 'VT. — Mil. Ru- 
man Kettle. E. I. 
2. U.urem (L.); 1. opposite elliptic-ovate serrate, s/«fo;s axil- 
lary nearly simjyle two together falliny shoH of the j^etiole, seeds 
oblong. — E.B. 1236. — Scarcely a foot high, glabrous, wilih sting- 
ing bristles. — Common weed. A. VI. — IX. E. S. I. 
3. U. dioica (L.) ; 1. opposite cordate serrate, spikes axillary 
panicled exceeding the petiole, seeds ovate. — E. B. 1750. — Creep- 
ing. St. 2 — 3 ft. high. Stinging. Dark green. — /3. angustifolia 
(W. & G.) ; 1. ovate-lanceolate roimded but not cordate at the 
base.— Common. P. VI.— IX. E. S. I. 
3. Htj'mtjlus Linn. Hop. 
1. H. Liipulus (L.). — E. B. 427. — Well known by its long 
twining stems, opposite rough 3 — 5-lobed serrate leaves, and 
ovoid or globular catkins. Male fl. in loose panicles. — A true 
native in many parts of England. P. VII. E. 
