RUBIACEjE. (madder family.) 181 



Var. longifolia, Gray. Smooth; leaves lanceolate or linear, 1 -ribbed, the 

 lowest spatulate-oblong; calyx-lobes as long as the globose capsule. (Hous- 

 tonia longifolia, Willd.) — With the preceding. 



Var. tenuifolia, Gray. Branches and pedicels filiform, spreading; leaves 

 remote, narrow-linear; flowers and capsules smaller. (Houstonia tenuifolia, 

 Natt.) — Mountains of North Carolina. July. 



5. O. angUStifolia, Gray. Smooth; root woody; stems clustered, erect, 

 branching above ; leaves linear ; cymes crowded, with the central flowers nearly 

 sessile ; corolla white, very hairy within ; capsule ovoid, as long as the calyx- 

 teeth. (Hedyotis stenophylla, Ton: §- Gray.) — Sandy pine barrens, Florida, 

 and westward. June and July. — Stems 1° - 2° high. 



Var. filifolia. Stem shrubby at the base, diffusely branched ; leaves filiform, 

 remote ; cymes scattered, 3-flowered, the slender pedicels ecmal and spreading ; 

 capsule obcordatc, rather longer than the calyx-teeth, the upper half free. — 

 South Florida. — Stem slender, 6' - 10' long. Flowers and capsules very small. 



# # # Corolla wheel-shaped, shorter than the calyx-lobes : flowers axillary and termi- 



nal, single or clustered, sessile : stamens and style very short : capsule enclosed in 

 the calyx-tube : perennial: stipules fringed. 



6. O. Boscii. Stems 4-angled, smooth, diffuse ; leaves linear ; flowers sin- 

 gle, or 2-3 together; corolla white or purplish; capsule ovoid. (Hedyotis 

 Boscii, DC.) — River-banks, Florida to South Carolina, and westward. July. 

 — Stems 6'- 10' long. 



7. O. glomerata, Michx. Stems terete, smooth or pubescent, branching; 

 leaves oblong or oval, short-petioled ; clusters dense, many-flowered ; corolla 

 greenish-white. (Hedyotis glomerata, Ell.) — Wet places, Florida to North 

 Carolina, and westward. July. — Stems 10'- 15' high. 



# # # =fc Corolla funnel-shaped, -5-lobed, longer than the calyx-teeth : flowers axillary 



and terminal, pentamerous : capsule top-shaped, included in the calyx-tube: annual: 

 stipules fringed. 



8. O. Halei. Stem weak, diffuse, forking; leaves oval-oblong, acute at 

 each end, somewhat fleshy; flowers solitary, or in short 3-5-flowered cymes, 

 white. ( Hedyotis Halei, Torr. $- Gray.) — Banks of rivers, South Florida, and 

 westward. July. 



19. SPIGELIA, L. Pinkroot. 



Calyx 5-parted ; the lobes linear-subulate, persistent. Corolla tubular-fun- 

 nel-shaped, 5-lobed, valvate in the bud. Stamens 5 : anthers linear. Style 

 slender, jointed, hairy above. Stigma capitate. Capsule composed of two few- 

 seeded carpels, which at length separate at the base and open loculicidally. — 

 Herbs. Leaves opposite. Flowers in one-sided terminal spikes, rarely solitary. 



1. S. loganioides, A. DC. Stem simple, ascending, somewhat 4-angled, 

 the upper part and joints slightly puberulcnt; leaves ovate or obovate, sessile, 

 the upper surface and margins roughish; flowers axillary, solitary, or the ter- 

 minal ones three in a cluster ; tube of the corolla more than twice as long as the 

 16 



