LOGANIA FAMILY. 273 



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

 significant herbs, with awl-shajjcd 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. verna. 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 Jiuwer ; application not obvious. The popular name from the 

 leaves, somewhat resembling those of the Horsebean.) 



M. trifoli^ta. Cold wet bogs N. : fl. late spring ; corolla white or tinged 

 with pink ; scape hardly 1° high. 11 



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, y. 



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. trach.ysp6rma, in deeper water, from Maryland S. : leaves rounder, 

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

 seeds roughened. 



86. LOGANIACE^, 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 6: 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 & lobes valvate in the bud. Stamens 5 : anthers linear. 



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



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



behind, and splitting 2 or 4 valves. 

 MITREOLA, 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. sempervirens, our only species : low grounds from E. Virg. S., climb- 

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

 profusion of axillary clusters of bright yellow very fragrant handsome flowers 

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



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

 Spiegel, latinized Spigelius.) Fl. summer. 



S. Maril^ndica, Maryland P. Rich woods, from Penn. W. & S. : 

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

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

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

 Root used as a vermifuge. ^ 

 18 



