THE GENERA OF BRITISH FLOWERING PLANTS 215 



Order 47. PRIMULACE^E 



272. Hottonia. Aquatic; leaves pectinate; 

 calyx 5-partite, hardly united below; corolla 

 salver - shaped ; stamens epipetalous; capsule 

 valvular. 



273. Primula. Leaves radical; calyx tubular, 

 S-fid; corolla salver-shaped, tube cylindrical; 

 lobes spreading"; stamens and styles dimorphic; 

 capsule 5-valved; seeds numerous. 



274. Cyclamen. Leaves radical; calyx bell- 

 shaped, 5-cleft; corolla bell-shaped; limb 5-par- 

 tite, reflexed; stamens 5; capsule many-seeded. 



275. Lysimachia. Leaves cauline; calyx 5-par- 

 tite; corolla rotate, limb 5-partite; stamens 5; 

 capsule 5-valved. 



276. Trientalis. Leaves cauline; flowers white; 

 calyx 7-partite; corolla rotate; stamens 7; cap- 

 sule many-seeded. 



277. Glaux. Leaves cauline; calyx bell-shaped, 

 coloured, 5-partite; corolla none; stamens 5; cap- 

 sule with few seeds. 



278. Anagallis. Calyx 5-partite; corolla rotate 

 or funnel-shaped; no tube; stamens 5; filaments 

 hairy; capsule opening 1 transversely. 



279. Centunculus. Calyx 4-partite; corolla 

 tube inflated subglobose; filaments smooth; 

 stamens 4-5; capsules with many seeds. 



280. Samolus. Leaves mainly radical; flowers 

 white; calyx 5-partite; corolla salver-shaped; 

 limb 5-partite; stamens 5; capsule half-inferior, 

 many-seeded. 



Order 48. OLEACE^: 



281. Fraxinus. Tree, deciduous; calyx o or 

 4-cleft; corolla o, or of 4 petals; wanting: in this 

 country; plant polygamous; fruit winged (samara), 

 dry. 



282. Ligustrum. Shrub, deciduous; calyx with 

 4 teeth ; corolla funnel-shaped, limb 4-cleft ; 

 stamens 2; fruit a fleshy berry, 2-seeded. 



Order 49. APOCYNACE^ 



283. Vinca. Creeping- shrub; calyx 4-partite; 

 corolla salver-shaped; tube 5-angled, long; fruit 

 of 2 follicles. 



Order 50. GENTIANACE^E 



284. Microcala. Leaves opposite; corolla 

 funnel-shaped, yellow; stamens 4; stigma i, 

 entire, peltate. 



285. Blackstonia (Chlora). Leaves perfoliate; 

 calyx 8-partite; corolla yellow, rotate, 8-partite; 

 stamens 6-8; capsule i -celled. 



286. Centaurium (Erythr&a). Calyx 4~5-fid ; 

 corolla funnel-shaped; limb 4~5-fid; stamens 4-5; 

 anthers twisted; stigmas 2; capsule 2-celled. 



287. Cicendia (Exacum). Calyx 4-partite; 

 corolla salver-shaped, limb 4-fid; stamens 4; 

 anthers erect; stigmas 2; capsule i-2-celled. 



288. Gentiana. Calyx 4~5-cleft; corolla funnel- 

 or salver-shaped; limb 4~5-cleft; stamens 4-5; 

 anthers erect; stigmas 2; capsule i-celled. 



289. Menyanthes. Leaves trifoliate; flowers 

 whitish-pink; calyx 5-partite; corolla funnel- 



shaped, fleshy; stamens 5; stigma notched; cap- 

 sule 2-valved. 



290. Limnanthemum. Leaves rounded; plant 

 aquatic, floating; flowers yellow; calyx 5-partite; 

 corolla rotate, limb 5-partite; stamens 5; stigma 

 2-lobed; capsule i -celled. 



Order 51. POLEMONIACE* 



291. Polemonium. Calyx s-fid; corolla rotate, 

 tube short; stamens 5; stig-mas 3-fid; capsule 

 3-celle'd. 



Order 52. BoRAGINACE^E 



292. Omphalodes. Radical leaves cordate ; 

 flowers in raceme, blue. 



293. Cynoglossum. Calyx 5-cleft; corolla 

 funnel-shaped; filaments very short; nutlets ovate, 

 with hooked bristles. 



294. Lappula (Echinospermum).Coro\\a. with 

 tube, lobes rounded; style very short; fruit a nut- 

 let, with hooked bristles. 



295. Symphytum. Calyx 5-cleft; corolla tubu- 

 lar, bell-shaped, 5-toothed, tube short, straight; 

 anthers included; nutlets ovate. 



296. Borago. Calyx 5-fid; corolla rotate; 

 anthers exserted, forming a cone; filaments 2-fid; 

 nutlets 4. 



297. Anchusa. Calyx 5-fid ; corolla funnel- 

 shaped, tube straight; stamens included; nutlets 

 depressed. 



298. Lycopsis. Calyx s-fid; corolla funnel- 

 shaped, tube curved; limb oblique. 



299. Pulmonaria. Calyx tubular, 5-fid, tube 

 long; corolla regular, funnel-shaped, throat 

 naked; stamens included; styles simple; nutlets 

 attached by base. 



300. Asperugo. Calyx 5-cleft, with smaller 

 teeth between, lobes leafy; corolla funnel-shaped, 

 scales in throat; filaments short; nutlets flattened, 

 granulate. 



301. Mertensia(Pneumaria). Calyx 5-fid, tube 

 short; corolla bell-shaped, tube with protuber- 

 ances; stamens exserted; nutlets fleshy, inflated. 



302. Myosotis. Calyx 5-partite, tube long; 

 corolla salver-shaped, twisted in bud; limb 5-fid; 

 stamens included; nutlets smooth. 



303. Lithospermum. Calyx 5-fid, short; corolla 

 regular, funnel-shaped; stamens included; nutlets 

 stony. 



304. Echium. Calyx 5-fid; corolla irregular, 

 bell-shaped, throat naked, swollen; stamens ex- 

 serted; filaments unequal; style 2-fid; nutlets 

 wrinkled. 



Order 53. CONVOLVULACR* 



305. Calystegia (Volvulus). Plant leafy; 

 bracts 2, large, enclosing the calyx; stigma 

 broad. 



306. Convolvulus. Bracts small, distant from 

 flower; corolla bell-shaped, plaited in bud; 

 style simple; stigmas 2; capsule 2-4-celled. 



307. Cuscuta. Parasite, leafless; twining; 

 calyx 4~5-cleft; corolla bell-shaped, imbricate in 

 bud; stamens 4-5; styles 1-2; capsule opening 

 transversely. 



