RUBIACK^E. (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, Torr. fr 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 equal and spreading ; 

 capsule obcordate, 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, EH.) Wet places, Florida to North 

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



* * * * Corolla funnel-shaped, o-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. PISKROOT. 



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 puberulent ; 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 



