GENUS Io. GENTIAN FAMILY. 17 
2. Bartonia paniculata (Michx.) Robin- 
son. Branched Bartonia. Fig. 3368. 
Centaurella paniculata Michx, Fl. Bor. Am, 1: 98. 
1803. 
eC. vee Steud. & Hochst. ; Griseb. Gent. 308. 1839 
B. paniculata Robinson, Rhodora 10: 35. 1908 
B, lanceolata Small, Fl. SE, U. S. 932. 1903. 
Slender, 8’-16’ high, mostly paniculately branch- 
ed above, the branches and scales mainly alter- 
nate, the slender pedicels spreading or ascending. 
Corolla yellowish-white or greenish, about twice 
as long as the calyx, its lanceolate acute or acumi- 
nate lobes 1’-14” long; anthers yellow. 
In wet soil, Massachusetts to Florida, Arkansas and 
Louisiana, Aug—Oct. 
Bartonia iodandra Robinson, of bogs in Newfound- 
land and Nova Scotia, has larger purplish flowers 
with broader ovate-lanceolate corolla-lobes and pur- 
ple-brown anthers, 
3. Bartonia vérna (Michx.) Muhl. White Bartonia. 
Fig. 3369. 
Centaurella verna Michx. Fl. Bor. Am, 1: 97. pl. 12. f. I. 1803. 
Bartonia verna Muhl. Cat. 16, 1813. 
Stem thicker and less rigid than that of the two preceding 
species, usually simple, 2-15’ high, racemosely or corymbosely 
I-several-flowered. Bracts distant, appressed, some of them 
commonly alternate; flowers solitary at the ends of the elon- 
gated erect peduncles, 3-4” long; peduncles sometimes 2’ 
long; corolla white, its lobes spatulate or obovate, obtuse, 
denticulate or entire, about 3 times the length of the calyx; 
ovary compressed; capsule about 23” high. 
In moist sand, southern Virginia to Florida and Lovisiana. 
March-May. 
Family 16. MENYANTHACEAE G. Don, Gard. Dict. 4: 167. 1837. 
BuckBEAN FAmMILy. 
Perennial aquatic or marsh herbs, with basal or alternate entire crenate or 
3-foliolate leaves, and clustered regular perfect flowers. Calyx inferior, deeply 
5-parted, persistent. Corolla funnelform to rotate, 5-lobed or 5-cleft, the lobes 
induplicate-valvate, at least in the bud. Stamens 5, borne on the corolla, and 
alternate with its lobes; filaments mostly short; anther-sacs longitudinally dehis- 
cent; pollen-grains 3-angled. Ovary 1-celled, the 2 placentae sometimes intruded ; 
style long, short or none. Fruit a capsule, or indehiscent. 
Five genera and about 35 species, widely distributed. 
Leaves 3-foliolate ; swamp plant. : I. Menyanthes. 
Leaves simple, entire, cordate, floating. 2. Nymphoides. 
1. MENYANTHES [Tourn.] L. Sp. Pl. 148. 1753. 
A perennial glabrous marsh herb, with creeping rootstocks, alternate long-petioled 
3-foliolate basal leaves, and white or purplish flowers, racemose or panicled on long lateral 
scapes or peduncles. Calyx 5-parted, the segments oblong or lanceolate. Corolla short- 
funnelform, 5-cleft, its lobes induplicate-valvate, fimbriate or bearded within, spreading. 
Stamens 5, inserted on the tube of the corolla; filaments filiform; anthers sagittate. Disk 
of 5 hypogynous glands. Ovary 1-celled; style subulate, persistent; stigma 2-lamellate. Cap- 
sule oval, indehiscent or finally rupturing. Seeds compressed-globose, shining. [Greek, per- 
haps month-flower, name used by Theophrastus.] 
A monotypic genus of the cooler parts of the northern hemisphere. 
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