POLYGALACEAE (MILKWORT FAMILY) 539 



Woods, in light soil, e. Que. to Man., s. -to Ga., 111., and Minn. May, June. — 

 A delicate plant, its handsome flowers 1.8 cm. long, rarely white. 



2. P. polygama Walt. Stems numerous from the biennial root, mostly 

 simple, ascending, very leafy, 1.5-2.5 dm. high; leaves oblanceolate or oblong ; 

 terminal raceme loosely raany-Jlowered^ the broadly obovate winiis longer than 

 the keel ; stamens 8 ; radical flowers racemed on short subterranean runners ; 

 lobes of the caruncle 2, scale-like, shorter than the seed. — Dry sandy soil, 

 N. S., westw. and south w. July. 



-f- -i- Flowers ichite, in a solitary close spike ; none cleistogamous. 



3. P. Senega L. (Sp:xeca Sxakeroot.) Stems several from thick and 

 hard knotty rootstocks, simple, 1.5-3 dm. high; leaves lanceolate or oblong- 

 lanceolate, with rough margins ; wings round-obovate, concave ; crest .short ; 

 caruncle nearly as long as the seed. — Rocky soil, N. B. to Hudson Bay, Alberta, 

 and south w. May-July. 



Var. latifblia T. & G. Taller, sometimes branched ; leaves ovate or lanceo- 

 late, 5-10 cm. long, tapering to each end. — Md. to L. Huron, Dak., and Tenn. 



* * Annuals, with all the leaves alternate ; flowers in terminal spikes, heads, or 



racemes, chiefly purple or rose-color, in summer ; none subterranean. 



+- Keel conspicuously crested ; claws of the true petals united into a long and 

 slender cleft tube much surpassing the icings. 



4. P. incarnata L. Glaucous ; stem slender, sparingly branched ; leaves 

 minute and hnear-awl-shaped ; spike cylindrical ; flowers flesh-color ; caruncle 

 longer than the narrow stalk of the hairy seed. — Dry sofl, N. J. to s. Ont., 

 Wise, Neb., and southw., rather rare. 



■f- -t- Keel minutely or inconspicuously crested; the true petals not longer but 

 mostly shorter than the wings ; seed pear-shaped. 



5. P. sanguinea L. Stem sparingly branched above, leafy to the top ; 

 leaves oblong-linear ; heads globular, at length oblong, very dense (8-10 mm. 

 thick), bright red-purple (rarely paler or even white); pedicels scarcely any; 

 icings broadly ovate, closely sessile, longer than the pod ; the 2-parted caruncle 

 almost equaling the seed. (P. viridescens L.) — Sandy and moist ground; 

 common, N. E.. westw. and southw. 



6. P. mariana Mill. Stem slender, at length corymbosely branched ; leaves 

 narrowly linear, acute, 6-16 mm. long ; spikes short and dense (6 mm. in diam- 

 eter); the small rose-purple flowers on pedicels of about the length of ihe pod; 

 Avings obovate- or oval-oblong, narrowed at the base, scarcely exceeding the 

 pod ; bracts deciduous with the flowers or fruits ; caruncle as long as and nearly 

 enveloping the stalk-like base of the minutely hairy seed. (F. fastigiata Nutt.) 

 — Pine barrens of N. J. to Ky., Fla., and Tex. 



7. P. Nuttallii T. & G. Resembling the last, but usuafly lower; spikes 

 cylindrical, slender ; flowers duller or greenish-purple, on very short pedicels; 

 the awl-shaped scaly bracts persistent on the axis after the flowers or fruits fall ; 

 seed very hairy, the caruncle smaller. — Dry sandy sofl, coast of Mass. ro Del., 

 Md., and southw. — Spike sometimes rather loose. 



8. P. Curtissii Gray. Slender, 2.5 dm. high ; leaves, etc., as in the two 

 preceding ; flowers rose-purple, in usually short racemes ; pedicels about equal- 

 ing or exceeding the persistent bracts ; the narrow oblong erect icings fully twice 

 the length of the pod; caruncle small, on one side of the stalk-like base of 

 the very hairy seed, which is conspicuously apiculate at the broader end. — Md. 

 to Ky., Ga., and Ala. — Founded upon an abnormal form with elongated 

 racemes and pedicels. 



* * * A7inuals with at least the loicer stem-leaves whorled in fours or fives; 



spikes terminating the stem and branches; floicering summer and autumn. 



■*- Spikes short and thick (8-18 mm. in diameter) ; bracts persisting after the 

 fall of the middle-sized rose- or greenish-purple flowers ; crest small. 



9. P. cruciata L. Stems 1-2.5 dm. high, almost winged at the angles, 

 with spreading opposite branches ; leaves nearly all in fours, linear and some- 



