THE GENERA OF BRITISH FLOWERING PLANTS 217 



343- Marrubium. Calyx tubular, teeth sub- 

 equal; upper lip of corolla straight, erect, flat, 

 lower 3-lobed ; 2 lower stamens longest ; anther- 

 cells spreading ; nutlets flatly truncate. 



344. Stachys. Calyx tubular, bell-shaped, 

 teeth 10, equal; upper lip of corolla hollow; lower 

 lip with lateral lobes reflexed; anthers smooth; 

 nutlets smooth. 



345. Galeopsis. Calyx-teeth 5, spinous; calyx 

 tubular, bell-shaped; upper lip of corolla arched, 

 lower 3-lobed, with 2 teeth on upper side ; anthers 

 ciliate; nuts flattened. 



346. Leonurus. Calyx-teeth 5, spinous; calyx 

 tubular, spinous ; upper lip of corolla nearly flat, 

 lower 3-lobed ; lobes blunt ; anthers smooth ; nut- 

 lets 3-sided, truncate. 



347. Lamium (and Galeobdolon). Calyx bell- 

 shaped, lo-ribbed; upper lip of corolla arched; 

 lower lip entire, with 1-2 teeth each side; anthers 

 hairy ; nutlets 3-sided. 



348. Ballota. Calyx funnel-shaped, lo-ribbed; 

 upper lip of corolla hollow, erect; lower lip 3-fid, 

 middle lobe largest; anthers smooth; nutlets 

 blunt. 



349. Teucrium. Calyx tubular, 5-toothed ; 

 upper lip of corolla 2-partite ; nutlets united. 



350. Ajuga. Calyx ovate, bell-shaped, 5-cleft; 

 corolla with short upper lip, entire or notched. 



Order 60. PLANTAGINACE^: 



351. Plantago. Plant terrestrial; flowers bi- 

 sexual; calyx 4-cleft ; corolla-tube ovoid, 4-partite; 

 stamens epipetalous; capsule opening trans- 

 versely. 



352. Littorella. Plant aquatic ; monoecious ; 

 male flowers stalked ; sepals 4; corolla-tube cylin- 

 drical ; limb 4-partite; stamens hypogynous; 

 female flowers sessile; sepals 3; style long; cap- 

 sule i-seeded. 



Order 61. ILLECEBRACE^ 



353. Illecebrum. Leaves opposite ; sepals 

 white, concave, long-pointed; no petals or small 

 scales. 



354. Herniaria. Leaves opposite, not united 

 below; sepals green, blunt; petals slender; stig- 

 mas 2 ; no style. 



355. Corrigiola. Leaves alternate; petals 5, 

 as long as sepals, oblong; stigmas 3. 



356. Scleranthus. Leaves opposite, filiform, 

 united below; sepals and petals 5; stamens 10 

 stigmas 2. 



Order 62. AMARANTHACE.E 



357. Amaranthus. Plant monoecious ; perianth 

 3-5-partite; stamens 3-5; stigmas 3; capsule 

 i -celled, i-seeded. 



Order 63. CHENOPODIACE^: 



358. Chenopodium. Flowers bisexual; no 

 bracts; perianth 3 -5-partite; stamens 5; stigmas 

 2-3; utricle membranous; pericarp free; testa 

 crustaceous. 



359. Beta. Perianth 5-partite; stamens 5 

 styles 2-3; utricle striate, hard above; pericarp 

 adhering to perianth ; testa thin. 



360. Atriplex (and Obione). Plant monoecious; 

 stem leafy; male flowers 3-5 sepals; stamens 5; 

 style o; female 2 sepals; perianth flattened; 

 stamens o; stigmas 2; pericarp membranous; 

 ;esta crustaceous. 



361. Salicornia. Flowers bisexual; stem leaf- 

 ess, jointed ; perianth fleshy ; stamens 1-2 ; style 

 short ; stigma 2-fid ; pericarp membranous. 



362. Suaeda (Dondid) (Lerckia).-Stem leafy; 

 leaves not spinous, ^-cylindrical ; perianth 5-par- 

 :ite; not appendaged; stamens 5; stigmas 2-3; 

 pericarp membranous; testa crustaceous. 



363. Salsola. Stem leafy ; leaves spinous ; 

 perianth 5-partite, segments appendaged, trans- 

 versely winged in fruit; stamens 5; styles 2; 

 pericarp membranous. 



Order 64. POLYGONACE^E 



364. Polygonum. Flowers in raceme; perianth 

 5-partite, segments sub-equal; stamens 5-8; 

 styles 2-3; fruit compressed, 3-angled, wingless. 



365. Fagopyrum. Flowers cymose; perianth 

 5-partite; stamens 8; styles 3; nut 3-angled; 

 cotyledons large, leafy, twisted plicate. 



366. Rumex. Perianth 6-partite, 3 inner seg- 

 ments longer; stamens 6, in pairs; styles 3; fruit 

 3-angled. 



367. Oxyria. Perianth 4-partite, 2 inner seg- 

 ments large; stamens 6; stigmas 2, multifid; nut 

 flattened, winged. 



Order 65. ARISTOLOCHIACE^; 



368. Asarum. Herbaceous ; perianth bell- 

 shaped, 3-cleft; stamens 12; stigma 6-lobed; cap- 

 sule 6.celled. 



369. Aristolochia. Stem erect; perianth tubu- 

 lar, swollen below, mouth oblique; stamens 6; 

 style columnar; stigma 6-lobed; capsule 6-celled. 



Order 66. 



370. Daphne. Shrub, perianth 4-partite, deci- 

 duous ; stamens 8, in 2 rows ; fruit a berry, fleshy, 

 i -seeded. 



Order 67. 



371. Hippophae. Shrub, spinose; plant dioe- 

 cious; male flowers in catkin, scales ovate, 

 perianth of 2 leaves; stamens 4; female flowers 

 solitary; perianth tubular; style short; nut 

 i -seeded. 



Order 68. LORANTHACE^: 



372. Viscura. Hemi-parasite, on trees, yel- 

 lowish-green; plant dioecious; perianth fleshy, 

 4-partite; anthers opening by pores; stigma 

 sessile; berry i-seeded, white. 



Order 69. SANTALACE^E 



373. Thesium. Hemi-parasite on roots, green; 

 plant prostrate; leaves linear; perianth 4-5-cleft 

 funnel-shaped; stamens 5; style i ; nut drupe-like. 



Order 70. EUPHORBIACE^E 



374. Euphorbia. Plant monoecious; stem with 

 milky juice; involucre calyciform, several male 

 flowers (monandrous) surrounding i female. 



