UKTICACEjE. 
267 
Tr. III. ULMEM. Ovary 2-celled, seed pendulous, embryo 
straight. 
4. Ulmus. Fl. perfect. Perianth bellshaped, 4 — 5-cleft, per- 
sistent. Stam. 5. Styles 2. Caps, compressed, winged all 
round. 
Tribe I. Urticece. 
1. Parietaria Linn. 
1. P. officinalis (L.) ; 1. ovate or oblong-ovate without lateral 
ribs at the base, cymes 2 axillary bifid, segments of involucre 
ovate obtuse. — E. B. 879- — L- alternate. Fl. small, reddish. 
"* Involucre 2-leaved, each with 7 segments, 7-flowered, central 
fl. fertile, of the 3 fl. on each side the middle one is fertile but 
without stam. the other 2 with stam. and pistil." W. Wilson. 
Filaments jointed, elastic. Fr. black, shining. — x. erecta (Bab.) ; 
1. oblong-ovate attenuated at both ends, st. erect simple. P. erecta 
Koch, Reich. ! — /3. diffusa (Bab.) ; 1. ovate acuminate at both 
ends, st. prostrate or ascending diffuse branched. P. diffusa 
Koch, Reich. !— On old walls and rubbish. P. VI.— IX. Wall 
Pelletory. 
1. Urtica Linn. 
fl. U. pilulifera (L.) ; I. opposite ovate or cordate acuminate 
coarsely toothed, stipules oblong-ovate, clusters of fr. globose 
stalked, seeds tubercled. — E. B. 148. — About towns and villages 
in the east of England. A. VI. — VIII. Roman Nettle. E. I. 
+2. U. Dodartii (L.) ; I. opposite ovate or ovate-lanceolate 
nearly entire, stipules lanceolate, clusters of fr. globose stalked, 
seeds smooth. — In the east of England, rare. Copford, Essex. 
Upwell, Norf. Wisbeach, Cambr. See Ann. Nat. Hist. i. 195. 
A. VI.— VIII. E. 
3. U. urens (L.) ; 1. opposite elliptical serrate, spikes axillary 
nearly simple two together shorter than the petiole, seeds smooth 
opaque. — E. B. 123G. — Common weed. A. VI. — IX. Small 
Nettle. 
4. U. dioica (L.) ; 1. opposite cordate serrate, spikes axillary 
panicled longer than the petioles, seeds smooth opaque. — E. B. 
1750. — The form of the 1. is variable, being usually cordate but 
sometimes in fi. angustifolia (W. and G.) ovate-lanceolate rounded 
but not eordate at the base. — Common. P. VI. — IX. Great 
Nettle. 
Tribe II. Cannabinece. 
3. Humulus Linn. 
1. H. Lupulus (L.). The only species.— E. B. 427 — Well 
known from its long climbing stems, opposite rough 3 — 5-lobed 
N 2 
