1048 N ra. GENTIANACEAE 
ae Xen 
GENTIANEAE 
Su Bim, mostly deciduous : anthers recurving or twisting at maturity. 
Sti roundish, much shorter aes the style. 
Tolla-tube surpassing the c 1. CENTAURIUM. 
Corolla. tube much shorter than the calyx. 2. EUSTOMA. 
Stigmas linear or nearly so, about as eae as the style. 
irs. pe icelled, when more than one, paniculate: an- 
3. SABBATIA. 
Flo owers nlg when more than one, capitate: anthers 
4. LAPITHEA. 
Style ao. "BBort or wanting: anthers straight at maturity. 
Corolla not furnished with nectariferous structures. 
Corolla nour Ds in the sinuses of the lobes: calyx 
wi ior membr anc 
Sepals unequal, the inner much broader than the 
AE and thin-margined : corolla lobes fimbriate or 
5. ANTHOPOGON. 
Sepals essentially equal or if unequal the inner nar- 
e 
th ter: corolla-lobes entire or 
y toothed. 6. GENTIANELLA. 
Corolla pna plaits mue ep NSS of the lobes: calyx 
with an interior nen 7. DASXSTEPHANA, 
2 furnished with ese eas pits, glands, or scales, 
or 2 for each lobe. . 8. FRASERA. 
. OBOLAR 
Calyx-lobes 4, narrowed upward: petals sli vus united. 9. BARTONIA. 
Calyx-lobes 2. broadened upward: petals well united. 10. OBOLABIA. 
III. LEIPHAIM 
Humus plant with Jadi stems and small, ina flowers. 11. LEIPHAIMOS. 
CENTA Hill. Annual, biennial, or -sometimes perennial, rela- 
iay small herbs. Flowers in terminal 
mes. Calyx-lobes 4 or 5, keeled. Corolla 
4 
tube, often strongly involute, acuminate.— 
About 25 species, widely distributed. 
1. C. pulchellum (Sw.) Dru Stem 3-25 
em. tall: Pao dh of the See leaves elliptic 
to ovate, 5—20 mm. long, d use: calyx 6-8 
mm. long: coro olla 9—10 long; lobes 
elliptic-ovate, obtuse: rer 7. 9-8 mm. e 
[Erythraea pulchella (Sw.) Fri es.]— (CE 
TAURY. )—Fie slds and NAM Ae Hat variou 
provinces, Miss. to La., Ill, and N. Y. N " of Eu.—(W. I.)—Sum.-fall. 
2. EUSTOMA Salisb. Annual —— large herbs. Flowers solitary or in 
n panic eles. ue e 5 or 6 
‘pla des "of the u 
elliptic anceolate, L 
lobes mm. long: corolla rose-purple; 
lobes elliptic or oval, 17-20 mm. long: cap- 
sule 2-2.5 om. lon ng—Pinelands, coastal 
and-dunes and hammocks, pen. Fla. and 
Flori i Keys— —(W. I. )—A1ll year. —Albino 
forms occu 
