836 FLORA. 



merits lanceolate, coarsely dentate, irregularly incised, or pinnatifid; upper leaves 

 short-petioled or sessile, oblong or lanceolate, 2-8 cm. long, entire, each with a 

 sessile flower in its axil; flowers 1-1.5 cm. long; calyx-lobes lanceolate or ovate, 

 acute, about as long as the tube; corolla light yellow. 2-3 times as long as the 

 calyx, woolly in the throat; style short, club-shaped; capsule globose-ovoid, 6-8 

 mm. high, twice as long as the calyx. In moist thickets and along streams, Ohio 

 to Iowa, Neb., Ky. and Tex. Aug-Oct. 



24. DASYSTOMA Raf. 



Large herbs, partly parasitic on the roots of other plants, with opposite (rarely 

 whorled) or some alternate leaves, and showy yellow flowers, in terminal mostly 

 leafy-bracted racemes or panicles. Calyx campanulate or turbinate, 5-lobed, the 

 lobes longer than or equalling the tube. Corolla slightly irregular, funnelform, or 

 campanulate-funnelform, the tube villous or pubescent within, the limb spreading, 

 5-lobed. Stamens 4, didynamous, included, villous or pubescent; filaments slen- 

 der; anthers all alike, their sacs distinct, parallel, awned at the base. Style fili- 

 form. Capsule oblong, acute, loculicidally dehiscent, many- seeded, longer than 

 the calyx. [Greek, thick or hairy mouth, referring to the corolla.] About 8 

 species, of eastern N. Am. 

 Plants glandular-pubescent; corolla pubescent without; leaves finely divided; annuals or 



biennials. 



Glandular-pubescent above; leaves pinnatifid. i. D. Pedicularia. 



Glandular-pubescent throughout ; leaves 2-pinnatifid. 2. D. pectinata. 



Puberulent, cinereous or glabrous; corolla glabrous without; perennials. 

 Cinereous-puberulent. 



Leaves entire, dentate, or some of the lower pinnatifid. 



Leaves entire, undulate, or the lower pinnatifid, with entire lobes. 



3. D.fl f ava. 

 Upper leaves, or most of them, serrate, the lower pinnatifid with 



toothed lobes. 4. D. serrata. 



Leaves all pinnatifid, thin. 5. D. grandiflora. 



Glabrous or very nearly so throughout. 



Leaves entire, or the lowest dentate or incised. 6. D. laevigata. 



Leaves, at least all but the uppermost, pinnatifid. 7. D. Virginica. 



x. Dasystoma Pedicularia (L.) Benth. FERN-LEAVED FALSE FOXGLOVE. 

 (I. F. f. 3303.) Viscid above; stem much branched, leafy, 3-12 dm. high. Leaves 

 sessile, or the lower petioled, pinnatifid, ovate or ovate-lanceolate, usually broadest 

 at the base, 2-8 cm. long, the segments incised-dentate ; pedicels slender, ascending, 

 2-5 cm. long in fruit; calyx-lobes oblong, foliaceous, usually incised or pinnatifid, 

 6-8 mm. long; corolla 2.5-3.7 cm. long, the limb about 2.5 cm. broad; capsule 

 pubescent, 10-12 mm. long, its beak flat. In dry woods and thickets, Me. and 

 Ont. to Minn., Fla. and Mo. Aug.-Sept. 



2. Dasystoma 4 pectinata (Nutt.) Benth. CUT-LEAVED FALSE FOXGLOVE. 

 Similar to the preceding, but densely glandular-pubescent nearly to the base, and 

 the leaves 2-pinnatifid; calyx densely glandular-pubescent, its lobes pinnatifid. In 

 dry soil, Ga. to Ky.. Mo., Fla. and Tenn. May-Sept. 



3. Dasystoma flava (L.) Wood. DOWNY FALSE FOXGLOVE. (I. F. f. 3304.) 

 Downy, grayish; stem strict, simple, or with a few nearly erect branches, 6-12 dm. 

 high. Leaves oblong, lanceolate or ovate-lanceolate, firm, entire, or the lower 

 sinuate-dentate or sometimes pinnatifid, 7-15 cm. long, short-petioled, the lobes 

 obtuse; the upper sessile, passing into the bracts of the raceme; pedicels stout, 

 usually shorter than the calyx even in fruit; calyx-lobes lanceolate, entire, about as 

 long as the tube; corolla 3-5 cm. long, its tube much expanded above; capsule 

 16-20 mm. long, pubescent, twice as long as the calyx. In dry woods and thick- 

 ets, Mass, to Ont., Wis., Ga. and Miss. July-Aug. 



4. Dasystoma serrata (Torr.) Small. SERRATE FALSE FOXGLOVE. Puberu- 

 lent, similar to the preceding and the following species. Lower leaves pinnatifid, 

 their lobes serrate or incised; upper leaves small, serrate or entire. Calyx-teeth as 

 long as the tube, or longer. Mo. to Ark. and La. July-Sept. 



5. Dasystoma grandiflora (Benth.) Wood. WESTERN FALSE FOXGLOVE. 

 (I. F. f. 3305.) Cinereous-puberulent and roughish; stem much branched, leuiV to 

 the top, 6-9 dm. high. Leaves short-petioled, thin, ovate or ovate- lanceolate in 



