LOGANIA FAMILY. 273 



4. BARTONIA. (Named for Prof. B. S. Barton, of Philadelphia.) In- 

 significant herbs, with awl-shaped scales for leaves, and a few peduncled white 

 flowers. (T) 



B. ten^lla. Woods : 5' - 10' high, with branches or peduncles 1 -3-flow- 

 ered ; lobes of corolla oblong, acutish ; ovary 4-angled : fl. summer. 



B. V^rna. Bogs, only S. : smaller, less branched, 1 -few-flowered; flowers 

 larger, in early spring ; lobes of corolla spatulate, obtuse ; ovary flat. 



5. MENYANTHES, BUCKBEAN. (Name from Greek words for 

 month and floivcr ; application not obvious. The popular name from the 

 leaves, somewhat resembling those of the Horsebean.) 



M. trifoliata. Cold wet bogs N. : fl. late spring ; corolla white or tinged 

 with pink ; scape hardly 1 high. 2/ 



6. LIMNANTHEMUM, FLOATING-HEART. (Name formed of 

 Greek words for swamp and blossom. ) But our species grow in water, and pro- 

 duce through the summer the small white flowers, accompanied by spur-like 

 thick bodies, probably of the nature of roots. ^ 



L. lacunbsum, is common E. & S. : leaves l'-2' long, on very slender 

 petioles, entire ; lobes of corolla broadly oval ; seeds smooth and even. 



L. trachysp^rma, in deeper water, from Maryland S. : leaves rounder, 

 2' - 6' broad, wavy-margined, roughish or dark-pitted beneath ; petioles stouter ; 

 seeds roughened. 



86. LOGANIACE^I, LOGANIA FAMILY. 



Known among monopetalous plants by having opposite leaves 

 with stipules or a stipular line between their bases, along with a 

 free ovary ; the flower regular or nearly so, and stamens as many 

 as the lobes of the corolla and alternate with them. 



1. Woody twining climber, with evergreen leaves and showy flowers. 



1. GELSEMIUM. Calyx 5-parted. Corolla open funnel-form, the 5 lobes broad 



and imbricated in the bud. Stamens 5: anthers sagittate. Style slender: 

 stigmas 2, each 2-parted, lobes linear, ovary 2-celled. Pod oval, flattened 

 contrary to the partition, 2-valved. many-seeded. Seeds winged. 



2. Herbs, not climbing. 



2. SPIGELIA. Calyx 5-parted, the lobes narrow. Corolla tubular and some- 



what funnel-form, the 5 lobes valvate in the bud. Stamens 5: anthers linear. 



Style 1, slender, hairy above, jointed near the middle. Pod short, twin, 



2-celled, few-seeded, when ripe separating across near the base which is left 



behind, and splitting 2 or 4 valves. 



MIT REOL A, of the South, comprises a couple of quite inconspicuous weeds, and 

 POLYPREMUM, also S. is a common weedy plant; both wholly insignificant, 



as well in the herbage as in the minute white flowers. 



1. GELSEMIUM, YELLOW JESSAMINE of the South, the name an 

 Italian one for Jessamine, but of a different order from true Jessamine. 



G. Semp6rvirens, our only species : low grounds from E. Virg, S., climb- 

 ing trees, bearing shining lance-ovate small leaves (evergreen far S.), and a 

 profusion of axillary clusters of bright yellow very fragrant handsome flowers 

 (!' or more long), in early spring. 



2. SPIGELIA, PINK-ROOT or WORM-GRASS. (Named for Adrian 

 Spiegel, latinized Spigelius.} Fl. summer. 



S. Marilandica, MARYLAND P. Rich woods, from Penn. W. & S. : 

 nearly smooth, 6' -18' high; leaves sessile, lance-ovate, acute; flowers in 

 simple or forked spike-like clusters terminating the stem or branches ; corolla 

 H' long, slender, handsome, red outside, yellow within, the lobes lanceolate. 

 Root used as a vermifuge. 2/ 

 18 



