182 RUBiACEiE. (madder family.) 



calyx-Iobcs. (Ctt'lostylis, Ton: Si' Gray.) — Near Fort King, East Florida.— 

 Stem 6' - 10' high. Leaves 4' - 9" long. Corolla 4" long, white. 



2. S. gentianoides, Chapm. Stem erect, simple, 4-anglecl, roughish; 

 leaves roundish, ovate, or oblong, sessile, acute, the upper surface and margins 

 rouglioncd; spikes terminal, few-flowered ; lobes of the corolla connivent; sta- 

 mens and style included. — Light dry soil. West Florida. May and June. — 

 Stem 6' - 10' high. Corolla 6" - 1 0" long, pale rose-color. 



3. S. Marilandica, L. Stem simple, erect, smooth, 4-angled ; leaves 

 ovate-lanceolate, or oblong, acute, sessile, pubescent on the veins ; spikes tenni- 

 nal, many-flowered, sometimes forking ; corolla long, slender, the lobes spread- 

 ing; anthers and style exserted. — Rich woods, Florida to Mississippi, and 

 northward. May and June. — Stem l°-2° high. Corolla \V long, scarlet, 

 yellow within. — A popular vermifuge. 



20. MITEEOLA, L. Mitkk-wort. 



Calyx 5-parted. Corolla shoi't, 5-lobed, valvate in the bud, the tube roundish, 

 bearded in the throat. Stamens 5, included : anthers ovate. Styles 2, short, 

 united above. Stigma capitate. Capsule 2-partcd, mitre-shaped, many-seeded, 

 the two lobes opening on the inner face neai" the apex. Seeds oval, concave. — 

 Smooth herbs, with opposite leaves, and small white flowers in tei-minal and 

 axillary cymes, with the simple branches recurved in the bud. 



1. M. petiolata, Torr. & Gray. Stem branching; leaves thin, oblong, 

 acute, narrowed into a petiole. (Ophiorhiza lanceolata. Ell.) — Muddy banks, 

 Florida to Korth Carolina, and westward. Juno -Sept. Q) — Stem 4-angled, 

 1° - 2° high. Leaves 2' - 3' long. 



2. M. Sessilifolia, Torr. & Gray. Stem simple, 4-angled ; leaves thick, 

 ovate or roundish, strongly veined, sessile, i-ough on the margins ; flowers and 

 capsule veiy small. (Ophiorhiza Mitreola, Michx.) — Varies with lanceolate 

 obscurely-veined leaves, and larger flowers and fruit. — Grassy swamps, Florida 

 to North Carolina, and westward. July -Sept. (D — Stem 6'- 18' high. 

 Leaves 6" - 10" long. Plant pale green. 



21. POLYPREMUM, L. 



Calyx deeply 4-parted, persistent. Corolla wheel-shaped, bearded in the 

 throat, 4-lobed, imbricated in the bud. Stamens 4. Style single, very short. 

 Stigma ovoid, entire. Capsule ovoid, compressed, 2-eelled, loeulicidally 2-valved, 

 many-seeded. — A low smooth perennial herb, with 4-angled forking stems, linear 

 acute leaves, their bases united by the membranaceous stipules, and solitary ses- 

 sile white flowers in the forks of the stem. 



1. P. prooumbens, L. — Waste places, Florida to North Carolina. 

 June - Sept. — Stems 6' - 10', erect or prostrate, clustered. Flowers very small, 

 the corolla barely longer than the calyx-lobes. 



