150 OKLER 68. VALERIANACE.E. 



6 H. louglfolia Gaert. Radical leaves oval-elliptic, cauline linear or .ance-linear, 1 



veined ; fls. in small, paniculate cymes ; sepals shorter than the pod. 

 /3. trnuifolia. Much branched ; leaves very narrow ; ped. filiform. 

 y. cilioldta. Leaves oblong-linear, obtuse, often ciliate ; branches erect. N. and 

 W., all the forms, on river banks and prairies. If. June, July. 



7 H. angustil'olla MX. Slender, tall, strictly erect; Ivs. narrowly linear, 1- veined ; 



fls. very numerous, short- pedicellcd, in compact, terminal cymules ; cal. lobes subu- 

 late ; caps, obovoid or top-shaped, y. Prairies, 111. to La. 1 2f. June July. 



7. OLDENLANDIA, L. Calyx 4- or 5-lobed, persistent. Cor. funnel- 

 form, with a short tube, little longer than the calyx, 4-5-lobed. Sta. 4 5. 

 Sty. short or 0. Stig. 2. Caps, wholly adherent. Seeds very numerous 

 and minute (40 60 in each cell). Herbs erect or prostrate. Stipules with 

 2 4 subulate points each side. Flowers small, axillary, white. 



1 O. glomeriita MX. Creeping Greenhead. Stems assurgent ; Ivs. ovate-lanceolate, 



pubescent, narrowed at the base ; fls. glomerate in the axils and terminal ; cor. shorter 

 than the leafy calyx teeth. Swamps, N. Y. to La. 1 12'. June Sept. 



2 O. BoscII. Erect, much branched ; Ivs. lance-linear, acute ; fls. subsolitary, axillary, 



sessile. 7f Banks of rivers, S. 6 1CK. Corolla purplish. July, Aug. 



3 O. Hulel. Weak, diffuse, succulent ; Ivs. oval-oblong, acute ; fls. subsolitary, white, 



pentamerous. y. River banks, Fla. to La. 8 1(X. 



8. CEPHALANTHUS, L. BUTTON BUSH. Calyx limb 4-toothed. 

 Cor. tubular, slender, 4-cleft Sta. 4. Sty. much exserted. Shrubs with 

 opposite Ivs. and short stip. Fls. in globous heads, without an involucre. 

 C. occldeiitalis L. Lvs. opposite and in 3's, oval, acuminate, entire, smooth ; heads 



pedunculate. Margins of streams. 6f. Heads nearly V diam. July. 



9. FINCKNEYA, MX. Calyx 5-parted, one of the segm. in the outer 

 flowers changed to a large, rose-colored bract. Cor. tubular, lobes 5, spread- 

 ing. Sta, 5, exserted. Stig. 2-lobed. Caps. 2-valved, oo-seeded. ^ Lvs. 

 large, ovate. Cymes corymbous, terminal, splendidly radiant. Cor. purplish. 



P. piibesccns MX. Swamps, S. : common. 15 25f. Pods size of a hazel-nut. May, 

 June. In cultivation it is a shrub, flowering when 8 12f high. 



10. BOUVARDIA, H. K. Calyx toothleted between its 4 lobes. Co:, 

 tubular. Anth. 4, included. Caps. 2-partible, oo-seeded. Sds. margined. 

 J) Glabrous. Leaves lanceolate, coriaceous. (See p. 445.) 



1 IJ. TRIPHYLLA. Lvs. in whorls of 3's ; cymes corymbed ; fls. scarlet. Mexico. 2f. 



2 B VEU?COLOR. Lvs. opp. ; cymes racemcd ; cor. clavate, curved, red and purp. S. Am. 



ORDER LXVIII. VALERIANACE^E. VALERIANS. 



Herbs with opposite leaves and no stipules. Calyx adherent, the limb 

 cither membranous or resembling a pappus. Corolla tubular or funnel- 

 form, 4-5-lobed, sometimes spurred at base. /Stamens distinct, inserted into 

 the corolla tube alternate with, and generally fewer than its lobes. Ovary 

 inferior, with one perfect cell and two abortive ones. Seeds solitary, pen- 

 dulous, in a dry, indehiscent pericarp. 



1. VALERIANA. L. VALERIAN. Calyx limb at first veiy small, in- 



