250 LXXXII. LOGANIACER. 
clavate at the summit. Capsules as in Nuaia.—DC. Prod. x. 
p. 436. 
Trees or shrubs, natives of Asia, Africa, and especially South America, 
mostly tomentose or woolly. Leaves opposite. Inflorescence various.— 
3 Cape species, all Eastern. 
Orper LXXXIII. GENTIANEZ. 
Calyx free, commonly 5-(occasionally 4—12-) lobed, persistent. 
Corolla hypogynous, usually regular, marcescent ; limb of as 
many lobes as the calyx, twisted-imbricate Gn Menyanthee i 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 with the 
ovary or deciduous ; stigmas 2 or 1. Fruit 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 Menyanthee alternate), mostly 
connate at base, entire, exstipulate. Natives chiefly of the 
temperate and colder zones. 
Tribe 1. EvGEnTIANE®. Leaves opposite. Corolla twisted-imbricate 
in the bud. ‘Terrestrial. (Gen. 1-7.) 
Flowers red or purple (rarely white). Stamens 
much exserted, declinate. Perennials. 
Anthers straight ‘(not spirally twisted) . . . . 1. CHIRONIA. 
Anthers spirally twisted. 
A fleshy ring within the eit outside the 
(Caroll aucune tame ee st yom, 2. OR PEMTENE. 
No fleshy intra- -calycine ring 3. PLOCANDRA. 
Flowers yellow (rarely pale). Stamens shortly ex- 
serted or included, not declinate. Annuals. 
Anthers at length recurved. 
Anthers exserted . 4, SEBRA. 
Anthers included; 1 gland at apex, 2 glands 
at base. . . . 5. LAGENIAS. 
Anthers straight, unchanged. 
Corolla with 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 a 2 minute 
glands abbaea: nse ale -. . . 7. EXOCHRNIUM. 
Tribe 2. MEnyantTHEmS. Leaves aliases, Corolla induplicate in bud. 
Water or marsh plants. (Gen. 8-9.) 
Erect marsh plants, with ovate leaves. Capsules 
2-valved . . . 8. VILLARSIA. 
Floating water plant, "with cordate-orbicular leaves. 
Capsules valveless, decaying . . .. . . . 9. LIMNANTHEMUM 
