442 : GENTIANACEZ MICROCALA 
OreER LXII GENTIANACEA Dumort. Anal. Fam. 20. 
Smooth herbs with bitter colorless juice, opposite, rarely 
alternate or verticillate, leaves without stipules, and perfect 
regular flowers. Calyx mostly 4—12-lobed or--toothed, often 
marcescent. Corolla gamopetalous, 4-12-lobed or -toothed, 
convolute or imbricated and usually twisted in the bud, often. 
marcescent. Stamens as many as lobes of the corolla, alter-. 
nate with them, inserted on its tube; the 2-celled anthers: 
opening longitudinally. Ovary free, one-celled, rarely 2-celled; 
with two parietal placents, or the whole parietes ovuliferous. 
Style single, with usually two-lobed or two-lamellate stigma. 
Capsule dehiscent through the placente. Seeds indefinitely 
numerous, rarely few. commonly small, anatropous, with a 
minute embryo in fleshy albumen. 7 
SUBORDER I GENTIANEZ Leaves always simple and entire. 
Lobes of the corolla never valvate in the bud. 
* Style filiform, usually deciduous from the capsule. 
1 Microcala Calyx 4-toothed and 4-angled: anthers cordate-ovate and 
unchanged in age. 
2 Erythrea Calyx 5-parted, or sometimes 4-parted: anthers oblong or 
linear, twisting spirally in 1 or 2 turns in age. 
* * Style short or subulate and persistent, or none, 
+ Corolla without nectariferous pits or large glands. 
8 Gentiana Corolla funnelform, campanulate orsalverform: seeds very 
numerous and small. | 
+ + Corolla with 1 or 2 nectariferous pits or spots, or an adnate 
scale to each lobe.: 
4 Swertia Corolla rotate, usually 5-parted: capsule ovate: seeds com- 
paratively large. ‘ 
5 Frasera Corolla rotate, 4-parted: seeds comparatively few and large. 
SUBORDER 11 MENYANTHE® Leaves often crenate or trifolio- . 
late, all alternate and petioled. Corolla induplicate-valvate in 
the bud. . ) 
6 Menyanthes Corolla somewhat funnelform or campanulate, 5-cleft. 
Suborder 1, Gentianew DC. Prodr. ix 38. Leaves always sim- 
ple and entire, sessile, never alternate except in Swertia. Corolla 
never valvate in the bud. 
1 MICROCALA Link & Hoffm. Fl. Port,,i, 359. 
Little annuals with opposite entire sessile leaves and yellow 
flowers. ‘ Calyx 4-toothed and 4-angled. Corolla short-salverform 
bearing the 4 short stamens in its throat: anthers cordate-ovate, 
unchanged in age. Style filiform, deciduous: stigma as if com- 
pressed-capitate but of 2 fan-shaped lobes that are at first con- 
nivent, but at length separate. Seeds numerous, with close and 
foveolate coat. | | J 
