250 LXXXH. LOGA:N'lACEiE. 



clavate at the summit. Capsules as iu Nuocia. — BC. Prod. x. 

 p. 486. 



Trees or shrubs, natives of Asia, Africa, and especially South America, 

 mostly toraeutose or woolly. Leaves opposite. Inflorescence various. — 

 3 Cape species, all Eastern. 



Order LXXXIII. GENTIANE^. 



X Calyx free, commonly 5-(occasional ly 4- 12-) lobed, persistent. 

 Corolla hypogynous, usually regular, marcescent ; limb of as 

 many lobes as the calyx, twisted-imbricate (in Menyantliece in- 

 duplicate). Stamens on the corolla alternate with its lobes. 

 Ovary 1-celled or imperfectly 2-celled ; ovules numerous on 

 the inflexed margins of the carpels ; style continuous wdth the 

 ovary or deciduous ; stigmas 2 or 1. Emit capsular, rarely a 

 berry, 1-celled, 2-valved. Seeds albuminous. — Herbs, rarely- 

 shrubby, very often glabrous, not milky, but very bitter in all 

 parts. Leaves opposite (in Menyanthew alternate), mostly 

 connate at base, entire, exstipulate. Natives chiefly of the 

 temperate and colder zones. 



Tribe 1. Eugentiane^. Leaves opposite. Corolla twisted-imbricate 

 in the bud. Terrestrial. (Gen. 1-7.) 

 Flowers red or purple (rarely white). Stamens 

 much exserted, declinate. Peremiials. 

 Anthers straight (not spirally twisted) .... 1. Chieonia. 

 Anthers spirally twisted. 



A fleshy ring within the calyx, outside the 



corolla 2. Oephium:. 



No fleshy intra-calycine ling 3, Plocanuka. 



Flowers yellow (I'arely pale). Stamens shortly ex- 

 serted or included, not declinate. Annuals. 

 Anthers at length recurved. 



Anthers exserted 4. Seb.ea. 



Anthers included ; 1 gland at apex, 2 glands 



at base 5. Lagenias. 



Anthers straight, unchanged. 



Corolla witl) slender tube. Anthers separate, 



on short filaments 6. Belmontia. 



Corolla with wide tube, funnel-shaped. An- 

 thers united by their edges, opening out- 

 wards ; 1 large gland at apex, 2 minute 

 glands at base 7. Exoch^nium. 



Tribe 2. Mentanthe^. Leaves alternate. Corolla induplicate in biid. 

 "Water or marsh plants. (Gen. 8-9.) 

 Erect marsh plants, with ovate leaves. Capsules 



2-valved 8. Yillaesia. 



Floating water plant, with cordate-orbicular leaves. 



Capsules valveless, decaying 9. Limnanthemfm 



