302 Loganiacee—Spigelia. 
1. SPIGELIA. 
Herbs with the flowers in one-sided spikes. Corolla long, 
tubular, with 5 small nearly erect teeth at the top. Stamens 
5. Style jointed near the middle. Fruit composed of two 
carpels, finally separating and bursting down the back, few- 
seeded. This is exclusively an American genus, embracing 
about thirty species, mostly from the warmer and _ tropical 
parts. 
1. S. Mariléndicu. Worm-grass or Pink-root.—A hand- 
some herbaceous plant usually growing about a foot high. 
Leaves sessile, ovate-lanceolate, glabrous. Flower-spike ter- 
minating the simple stems, 4- to 8-flowered, the lowermost 
opening first. Flowers crimson without, bright yellow within, 
about 14 inch lone, produced in Summer. 
Orvser LXXI.—GENTIANACEA. 
Annual, biennial, or perennial herbs, usually erect and gla- 
brous. Leaves simple, entirc, opposite or whorled (except in 
Menydnthes, where they are alternate and trifoliolate; and 
alternate aud floating in Limndnthemum), exstipulate, often 
strongly nerved. Flowers regular, bisexual, solitary or in 
dichotomous or trichotumous cymes. Calyx inferior, 4- to 8- 
lobed; lobes valvate or contorted in bud. Corolla hypogynous, 
often persistent, rotate, funncl-shaped or campanulate, 4- to 8- 
lobed ; lobes mostly contorted in bud. Stamens 4 to 8, inserted 
upon the corolla-tube ; filaments free. Capsule 1- or partially 
2-celled, containing many seeds attached to 2 opposite parietal 
placentas. Seeds small, albuminous. This order numbers 
about 60 genera and 450 species, chiefly from temperate and 
mountainous regions. Several of our native species are very 
beautiful, and a few of them merit introduction into large 
gardens. The Bog-Bean, AMenydnthes trifoliata, is a hand- 
some plant for marshy bogs. It has trifoliate leaves and 
radical scapes of white or pink fringed flowers about a foot 
high. Linndnthemum nympheoides is a rare aquatic plant 
with small orbicular floating leaves and bright yellow umbel- 
late flowers about 1 inch in diameter. The Yellow Wort, 
Chlore perfolidty, is a glaucous annual growing a foot or more 
