RUBIACEAE (MADDER FAMILY) 



753 



914. H. purpurea. 



** Erect, mostly perennial herbs, 1-5 dm. high, with stem-leaves sessile, and 

 flowers in small terminal cymes or clusters ; corolla funnel-form, white to 

 purplish, often hairy inside; seeds meniscoidal, with a ridge across the 

 hollowed inner face. 



*- Pod free above the middle. 



-w Pod distinctly broader than high. 



5. H. purpurea L. Smooth or slightly pubescent, 1-5 dm. 

 high ; leaves varying from roundish-ovate to lanceolate, 3-5- 

 ribbed ; calyx-lobes longer than the half-free globular pod. 



Woodlands, Md. to s. la., and southw. May-Sept. FIG. 

 914. Var. PUBESCENS Britton. Stems and leaves densely 

 pubescent. Range of the typical form. 



6. H. tenuifblia Nutt. Slender, lax, diffuse, 1.5-3 dm. 

 high, with loose inflorescence, and almost filiform branches 

 and peduncles ; cauline leaves all linear, hardly over 2 mm. 

 wide. (H. purpurea, var. Gray.) Dry rocks, e. O. to Va., 

 N. C., and Tenn. 



M- -t-t- Pod as high as broad. 

 = Leaves smooth. 



7. H. Iongif61ia Gaertn. Similar to no. 5; stem 1-2.5 dm. high, mostly gla- 

 brous ; leaves oblong-lanceolate to linear, 1.5-2.5 cm. long ; radical oval or ob- 

 long, less rosulate, not ciliate ; calyx-lobes subulate, 1.5-2.5 mm. 



long. (H. purpurea, var. Gray.) Rocky or gravelly ground, 

 centr. Me. to Man., s. to Ga. and Mo. FIG. 915. 



8. H. lanceolata (Poir.) Britton. Stoutish, 1.5-4 dm. high; 



leaves broadly lanceolate, thickish ; inflorescences very leafy ; 



calyx-lobes lanceolate, herbaceous, 5-9 mm. long, much exceed- 

 ing the globose-ovoid capsule. (H. purpurea, 

 var. calycosa Gray.) Dry soil, s. Me. to 111., 

 Okla., and Ala. FIG. 916. 



915. H. longifolia. 



= = Leaves (at least the basal) ciliate. 



9. H. ciliolata Torr. Stems 1-2 dm. high ; leaves 1-2 cm. 

 long, thickish ; cauline oblong-spatulate ; radical oval or oblong, rosulate, hirsute- 

 ciliate ; calyx-lobes a little longer than the pod. (H. purpurea, var. Gray.) 

 Rocky banks and shores, w. N. Y. and s. Ont. to Minn., 111., and Ky. 



t~ -<- Pod free only at summit. 



10. H. angustifblia Michx. Stems tufted, from a hard or woody root ; leaves 

 narrowly linear, acute, 1-ribbed, many of them fascicled ; flowers crowded, 

 short-pediceled ; lobes of the corolla densely bearded inside ; pod obovoid, acute 

 at base, only its summit free, opening first across the top, at length through the 

 partition. Barrens, 111. to Kan., s. to Tex. and Fla. (Mex.) 



9. OLDENLANDIA [Plumier] L. 



Calyx 4-lobed, persistent. Corolla short, the limb valvate in the bud. An- 

 thers short. Style 1 or none ; stigmas 2. Pod thin, 2-celled, opening loculi- 

 cidally across the summit. Low herbs, with small stipules united 

 to the petioles. (Dedicated to the memory of H. B. Oldenland, 

 a Danish physician and botanist, who died about the end of the 

 17th century at the Cape of Good Hope.) 



1. 0. uniflbra L. An inconspicuous pubescent or smoothish 

 branched and spreading annual, 0.2-4 dm. high ; leaves ovate 

 to oblong ; flowers in sessile axillary clusters ; corolla nearly 

 wheel-shaped, white, much shorter than the calyx. (0. glomerata 

 Michx.) Wet places, near the coast, N. Y. to Fla. and Tex. 



FlG. 917. 917. O. unitloru. 



916. H. lanceolata, 



GRAY'S MANUAL 48 



