150 RUBIACEiE. 



2. H. ciliolata Torr. : smooth, somewhat branched above ; radical leaves 

 oval or oblong-spatulate, tapering into a petiole, the margin ciliate ; cau- 

 line oblanceolate ; flowers in corymbose clusters ; peduncles and pedicels 

 short, Haustonia ciliolata Torr. Fl. 



Wet banks. Western and Northern N. Y. Can. W. to Ml«s. May, Aug. 

 1).. — Stems usually numerous, 4 — 6 inches high, at length spreading. Flowers 

 numerous, terminal, pale purple. Fringed-leaved Hedyotis. 



3. H. longifolia Hook : smooth ; stem erect ; leaves linear and oblong- 

 linear, tapering at base, rough on the margin, but not cihata ; radical ones 

 narrow-oval or oblong, tapering into a petiole ; flowers mostly in threes, 

 terminal, nearly sessile, Houstonia longifolia Willd. 



Dry hills and fields. Can. to Flor. W. to Miss. June — Aug. %..— Stems 

 5 — 8 inches high, slender, branched at the top, 4-sided. Flowers usually in 

 threes, pale purple. Corolla about thrice as long as the lobes of the calyx. 



'Long-leaved Hedyotis. 



4. H glomerata Ell. : stem erect or somewhat diflfuse, branching, pubes- 

 cent ; leaves oblong-lanceolate, attenuate at ba*e or slightly petioled, nearly 

 smooth; flowers in clusters, sessile, axillary and terminal; tube of the 

 calyx hairy, shorter than the lobes. H. auriculata Walt. Oldenlandia 

 glonierata Mich. 



Moist grounds. N. Y. N. J. to Flor. Aug. (I)- ^ — ^Whole plant dull green. 

 Stem 2—4 inches high, first simple, then branching and assurgent. Flowers 

 usually clustered, small, white. Cluster-Jlowered Hedyotis. 



5. H. purpurea Torr. ^ Gr. : stem erect or ascending^ 4-sided, pubescent ; 

 leaves ovate or ovate-lanceolate, closely sessile, 3 — 5-nerved, smoothish 

 above, lower surface and margins pubescent ; flowers in terminal corjmabs ; 

 lobes of the calyx subulate-linear. Houstonia purpurea Linn. 



Woods. Penn. and Virg. W. to Miss, and Tenn. May— July. %.— Stems 

 usually several ^om the same root, about a foot high, branching. Flowers pur- 

 ple. Purple Hedyotis. 



2. MITCHELLA. Z/mw.— Partridge Berry. 

 (In honor of Dr. John Mitchell, a botanist of Virginia.) 



Flowers in pairs, with their ovaries united. Calyx 4-toothed. 

 Corolla funnel-form ; tube cylindric ; limb 4-parted, spreading, 

 vdllous on the inner side. Stamens 4, adnate to the tube, 

 scarcely exserted. Stigma 4-cleft. Berry didymous, 4-seeded. 



M. repens Linn. : stem branched, smooth, creeping; leaves opposite, pe- 

 tioled, roundish-ovate, ofl;en slightly cordate, smooth, very entire ; flowers 

 terminal, in pairs. 



Woods, among dried leaves. Can. to Flor. W. to Ark. June, July. %. — 

 A small evergreen, creeping plant. Flowers white, hairy within, fragrant. 

 Berries red. Partridge Berry. 



3. CEPHALANTHUS. Linn.— Button Bush. 

 (From the Greek /cf^aX/j, a head, and avOo?, a flower.) 



Calyx small, angular, inversely pyramidal, 4-cleft. Corolla 

 tubular, slender^ 4-cleft. Style much exserted. Stigma glo- 



