111 
Genus 3. Buxus. 
B. SEMPERVIRENS, Boz. Fig. 1101. 
An evergreen shrub. Leaves oblong-ovate, convex, glossy. Chalk 
hills; local. 3-15 ft. April. Yellowish. (2) #. B. 1. 1341. 
E. B. 2.1306. H. & Arn, 380. Bab. 290. Lind, 223. 
Oxper LXXVIT. CALLITRICHACEA. 
Genus 1. CaLLirrRIcHeE. 
C. verRNA. 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. (2) 
EF. B. 1.722. £. B. 2.1239. H.& Arn. 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. (%) #. B. Supp. 2864. H. & 
Arn. 381. Bab. 293. Lind. 243. 
C. pepuncuLATA. Stalked Water Starwort. Fig. 1104. 
Leaves all submerged, linear. Fruit-bearing peduncles long. Lobes 
of capsules bluntly keeled. Pools. Ann. June—Oct. (%) 2&. B. 
Supp. 2606. #. B. 2.1239*. H.& Arn. 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. (2) E£. B. 
Supp. 2732. H. B. 2. 1239**. H. §& Arn. 381. Bab. 294. Lind. 243. 
Orper LXXVITI. CERATOPHYLLACEAI. 
Genus 1. CeratorpHYLLuM. 
C. pemMERsuUM. Spiny-fruited Hornwort. Fig. 1106. 
Stems submerged. Leaves in narrow segments, densely whorled. 
Fruit with 2 spines. Pools. Perenn. July and Aug. (§) 2. B. 
1.947. #.B.2.1314. H.& Arn. 382. Bab. 293. Lind. 225. 
C. supmersum. Hornwort. Fig. 1107. 
Stems submerged. Leaves in more distant whorls. Sepals entire. 
Fruit without spines. Pools. Perenn. Sept. (4) #. B.1.679. HE. B. 
2.1315. H. & Arn. 382. Bab. 293. Lind, 225. 
Orper LXXIX. URTICACE. 
Genus 1. Urrica. 
U. prnunirerA. 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. (2) FF. B. 1. 148. #. B. 2. 1307. H. & Arn. 384. 
Bab. 295. Innd. 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. (2) 
E. B.1.1236. FE. B.2.1308. H.&§ Arn. 384. Bab. 295. Lind. 219. 
U. prorca. Common Nettle. Fig. 1110. 
Leaves cordate, with stinging hairs. Flowers in much-branched 
axillary clusters ; usually dicecious. Way-sides ; abundant. 2-4 ft. 
Perenn. July and Aug. Green. (%) #.B.1.1750. #. B. 2.1309. 
H. § Arn. 384, Bab.295, Lind. 219. 
