ORDER 99. APOCYNACE.E. 269 



2-lobcd. Caps, opening by decay. ? Stagnant water. Pet. long, bearing an 

 umbel of small white fls. below the roundish leaf-blade, also oblong tubers. 



1 L. lacunosum Griseb. Leaves small (1 20> smooth, round-reniform ; seeds 



smooth and shining. N. Eng, to Fla. (Villarsia lacunosa Vent.) 



2 li tracliyspermum Gray. Lvs. large (3 50, dotted and pitted beneath; seeds 



muricate about the margins. Md. to Fla. and La. (Menyanthes, MX.) 



ORDER XCVIIL LOGANIACEJE. 



Herbs or shrubs with opposite leaves, stipules between the petioles or at 

 least a ridge, and with 4- or 5-parted regular gamopetalous flowers. Ovary 

 superior, stigmas as many as the cells. Fruit a 2-celled capsule, or a 1-2- 

 seeded drupe. Seeds winged or peltate, with albumen. Fig. 47. 



* Delicate, twining shrubs, with large yellow flowers. S GELSEMIUM. 1 



* Low herbs. x Flowers scarlet, tubular, with one style SPIGELIA. 2 



x Flowers small, white, 5-parted, in 1-sided racemes MITREOLA. 3 



x Flowers small, white, 4-parted, in axillary cymes POLYPRKMUM. 4 



1. GELSEMIUM. Juss. YELLOW JESSAMINE. Cor. bell-funnel-form 

 with 5 short rounded lobes. Sta. 5, now longer and now shorter than the 

 style (dimorphous). Caps, flattened, twin, cells each with 4 6 winged sds. 

 *> Very slender, with numerous flowers. The stipules a mere ridge. 



G. sempervirens Ait. Woods and banks, Va., and S., overrunning bushes and low 

 trees. Leaves thick, shining, lanceolate. Flowers 1'. March May. 



2. SPIGELIA, L. PINK-ROOT. Calyx seg. linear-subulate. Cor. nai- 

 rowly funnel-form, limb 5-cleft. Anth. 5, convergent. Caps, twin-lobed, 

 few-seeded. Herbs, with the flowers sessile in terminal spikes. Fig. 47. 



S. Marilandica L. Stem square, erect, simple; leaves sessile, ovate-lanceolate; 

 spike scorpoid, uncoiling as the 3 8 handsome flowers expand ; corolla 1$ 2' long. 

 V Thickets, Pa. to 111., and S. June. Medicinal. 



3. MITREOLA, L. Corolla tubular, short, 5-cleft, hairy in the throat. 

 Sta. 5, included. Ovary 2-celled, styles 2, united only at top with 1 stigma. 

 Capsule 2-horned, GO -seeded. (D Flowers in several scorpoid spikes at 

 top of a long terminal peduncle. June August, 



1 M. petlolata T. & G. Branching ; leaves ovate to lanceolate, tapering at base to 



a petiole ; raceme loose-flowered. Va., and S. 1 2f. 



2 M. sessillfolia T. & G. Nearly simple ; leaves oval to elliptical, sessile, shorter 



than the internodes ; raceme close-flowered. S. C. to Fla. 1018'. 



4. POLYPREMUM, L. Calyx seg. 4, subulate. Corolla broad bell- 

 form, lobes a little unequal, obtuse, throat bearded. Stamens 4, included. 

 Stigma subsessile. Capsule ovoid. Smooth, diffusely branched from 

 base, with linear-subulate leaves. Flowers sessile. 



P. prociimbens L. Dry fields, Va., and S. 612'. In dense patches. May Sept. 



ORDER XCIX. APOCYNACE.E. DOG-BANES. 

 Plant with an acrid, milky juice, entire, cxslipulatc, mostly opposite Jva. 



