Ill 
Genus 3. Buxus. 
B. SEMPERVIRENS. Box. Fig. 1101. 
An evergreen shrub. Leaves oblong-ovate, convex, glossy. Chalk 
bills; local. 3-15 ft. April. Yellowish. (%) E. B. 1. 1341. 
E. B. 2. 1306. H. Am. 380. Bab. 290. Lind. 223. 
Order LXXYII. CALLITRICHACE^. 
Genus 1. Callitriche. 
C. verna. Spring Water Starwort. Fig. 1102. 
Upper leaves floating in a star-like tuft, oval-lanceolate. Lobes of 
capsule bluntly keeled. Ann. Pools; common. April-Oct. (^) 
E.B. 1. 722. E. B. 2. 1239. H. Am. 381. Bab. 293. Lind. 243. 
C. PLATYCARPA. Fig. 1103. 
Fruit with the lobes slightly winged. A variety of verna. Pools 
and ditches. Ann. April-Oct. (§) E. B. Supp. 2864. H. 
Am. 381. Bab. 293. Lind. 243. 
C. pedunctilata. Stalked Water Starwort. Fig. 1104. 
Leaves all submerged, linear. Fruit-bearing peduncles long. Lobes 
of capsules bluntly keeled. Pools. Ann. June-Oct. (§) E. B. 
Supp. 2606. E. B. 2. 1239*. H.^ Am. 381. Bab. 293. Lind. 243. 
C. autumnalis. Autumnal Water Starwort. Fig. 1105. 
Leaves all submerged, linear, notched at the apex. Lobes of fruit 
broadly winged. Pools and ditches. Ann. June-Oct. (f) E. B. 
Supp. 2732. E. B. 2. 1239**. H. Am. 381. Bab. 294. Lind. 243. 
Order LXXVIII. CERATOPHYLLACEtE. 
Genus 1. Ceratophyllum. 
C. demersum. Spiny-fruited Hornwort. Fig. 1106. 
Stems submerged. Leaves in narrow segments, densely whorled. 
Fruit with 2 spines. Pools. Perenn. July and Aug. (§) E. B. 
1. 947. E.B. 2. 1314. H.^ Am. 382. Bab. 293. Lind. 225. 
C. submersum. Hornwort. Fig. 1107. 
Stems submerged. Leaves in more distant whorls. Sepals entire. 
Fruit without spines. Pools. Perenn. Sept. (f) E.B.1.579. E.B. 
2.1315. H. fy Am. 382. Bab. 293. Lind. Tib. 
Order LXXIX. URTICACEtE. 
Genus 1. Urtica. 
U. pilulifera. Roman Nettle. Fig. 1108. 
Leaves opposite, ovate, serrated, with stinging hairs. Fertile flowers 
in globular heads. Waste ground. 1-2 ft. Ann. June and July. 
Green, (f) E. B. 1. 148. E. B. 2. 1307. H. Am. 384. 
Bab. 295. Lind. 219. 
U. urens. Small Nettle. Fig. 1109. 
Leaves elliptical, with stinging hairs. Flowers in loose racemes. 
Waste ground; common. 8 in.-l ft. Ann. June-Oct. Green, (f) 
E. B. 1. 1236. E. B. 2. 1308. H.^Arn.Z 84. Bab. 295. Lind. 219. 
U. dioica. Common Nettle. Fig. 1110. 
Leaves cordate, with stinging hairs. Flowers in much-branched 
axillary clusters; usually dioecious. Way-sides; abundant. 2-4 ft. 
Perenn. July and Aug. Green. (|) E. B. 1.1750. E. B. 2.1309. 
H. Am. 38-i. Bab. 295. Lind. 219. 
