178 SCROPHULARIACEAE 



Gerardia auriculata Michx. 



[Vol.. III. 



Auricled Gerardia. (Fig. 3316. ) 



G. amiailala Michx. FI. Bor. \\\\. 2: c>o. iSo,^. 



Annual, scabrous; stem slender, simple, or 

 branched above, hirsute, i°-2° high. Leaves 

 lanceolate or ovate-lanceolate, acuminate at the 

 apex, sessile, mostly rounded and 2-lobed at 

 the base, or quite entire, i'-2' long, the basal 

 lobes oblong or lanceolate, obtusish, short; 

 flowers solitary in the upper axils, sessile, 

 purple, S"-io" long; calyx 5-cleft, its lobes 

 lanceolate, acute, slightly unequal, as long as 

 or longer than the tube; corolla densely pu- 

 berulent outside, glabrous within; filaments 

 glabrous; anlhersof the shorter stamens smaller 

 than those of the longer; anther-sacs obtuse at 

 the base; capsule oval-oblong, about yz' high, 

 a little shorter than the calyx. 



In moist open soil. Pennsylvania to Minnesota, 



south to North Carolina and Kansas, 

 at Woodbridge, N. ]. July-Seiit. 



Adventive 



10. Gerardia densiflora Bentli. Cut- 

 leaved Gerardia. (Fig. 3317.) 



G. densiflora Benth. Comp. Bot. Mag. I: 206. 1835. 



Annual, scabrous and short-hispid; stems stiff, 

 erect, branched, or simple, i°-2>i° high, very 

 leafy. Leaves sessile, ovate in outline, ascend- 

 ing, about \' long, pinnateh- parted nearly to 

 the midvein into 3-7 narrowly linear acute 

 rigid segments less than i" wide; flowers i'- 

 lyi' long, rose-purple, sessile in the upper axils; 

 calyx 5-cleft, its lobes linear, acuminate, ciliate, 

 about as long as the tube; corolla glabrous both 

 outside and within; filaments glabrous or vil- 

 lous; anthers of the shorter stamens smaller 

 than those of the longer; capsule about %' high, 

 shorter than the calyx. 



On dry prairies, Kansas to Texas. Aug. -Oct. 



26. CASTILLEJA Mtiti-s; L.f. Suppl. 47. 1781. 



Herbs, parasitic on the roots of other plants, with alternate leaves, and red yellow purple 

 or white flowers, in dense leafy-bracted spikes, the bracts often brightly colored and larger 

 than the flowers. Calyx tubular, laterally compressed, cleft at the summit on the upper side, 

 or also on the lower, the lobes entire or 2-toothed. Corolla very irregular, its tube not longer 

 than the calyx, its limb 2-lipped; upper lip (galea 1 arched, elongated, concave or keeled, 

 laterally compressed, entire, enclosing the 4 didynamous stamens; lower lip short, 3-lobed. 

 Anther-sacs oblong or linear, unequal, the outer one attached to the filament by its middle, 

 the inner one pendulous from its apex. Style filiform; stigma entire or 2-lobed. Capsule 

 ovoid or oblong, loculicidally dehiscent, many-seeded. Seeds reticulated. [Named for Cas- 

 tillejo, a Spanish botanist.] 



About 40 species, mostly natives of the New World. In addition to the following, about 21 

 others occur in the western parts of North .America. 



v.- Plants villous-pubescent. 

 Bracts broad, dilated, lobed, or entire. 



Stem leaves deeply and irregularly cleft into narrow segments. i.'C.'coccinea. 



Leaves linear-lanceolate, entire, or rarely with a few lobes. 2.'C indivisa. 



Bracts linear or linear-lanceolate, entire. j-lC minor. 



-If ■?;- Plants glabrous, woolly at the summit, or cinereous-puberulcnt. 

 Glabrous, or tomentose at the summit; leaves lanceolate, mostly entire. 4. C. acuminata. 



Cinereouspuberulent, pale; stem leaves cleft. 5. C. sessiliflora. 



