366 DIDYNAMIA AXG10SPERMIA 



oblong-lanceolate lobe on each side at base, very scabrous on boih surfaces. 

 Flowers sessile, often opposite. Calyx hirsutely scabrous, deeply 5-clefi; seg- 

 ments ovate-lanceolate, sub-acuminate. Corolla purple (rarely milk white), hairy- 

 pubescent, lobes ciliate. Stamens slightly hairy; anthers obtuse at each end. 

 Stigma ciarate. Capsule ovoid, minutely roughish-punctatc. Seeds oblong, mu- 

 cronate at each end, minutely scabrous-punctate, coated with an arillus-like en- 

 velope, which is diaphanous, cellular, and rcticulately rugose -pi tied. 

 Bab. Fields, and low grounds ; West Chester : very rare. Fl. Aug— Sept. Fr. Oct. 

 Obs. This plant, though frequent in the Western country, is extremely rare 

 east of the Alleghany mountains; and it is remarkable for making a transient ap- 

 pearance at long intervals. A single specimen was found herein 1816,— and it 

 was often but fruitlessly sought for, afterwards, until the year 1827 ; when it was 

 detected Inconsiderable quantity, by Mr. A. H. Derrick, among the stubble of a 

 wheat field, near the brick-yards on the S. W. side of this Borough. A few plants 

 were observed at the same place, the following year ; but since then, not a vestige 

 of it has been seen. Mr. Schtceinitz informed me it appeared in a similar manner, 

 near Nazaretn, Penn. in 1823. I have not heard of its being found elsewhere, on 

 this side of the Alleghanies. 



• * Flowers ycllo-w. 



4. G. flat a 9 £. Stem mostly simple, pubescent ; leaves lanceolate, 

 or oblong-lanceolate, pubescent, entire, or obscurely toothed, subsessile, 

 the lower ones often notched, or sparingly pinnatifid-lobcd, on longer 

 petioles; flowers subsessile; calyx pubescent, segments lance-ovate. 

 £eck 9 JSot. p. 268. Not! of Muhl. 



G. villosa (heterophylla) 1 Muhl. Catal. p. 58. 



Yellow Gerardia. 



Root perennial. Stem 2 to 3 feet high, subterete, clothed whh a short cinereous 

 pubescence. Leaves 1 or 2 to 6 or G inches long, and half an inch to near 2 inches 

 wide, roughish -pubescent, the upper ones gradually smaller, lanceolate, subsessile, 

 and nearly entire, the lower ones oblong-lanceolate, often somewhat pinnatifid- 

 Iqbed, narrowed at base to a distinct petiole. Flowers subsessile, opposite, ap- 

 proximated in a terminal leafy spike *1 to 6 or 8 inches long. Calyx densely pu- 

 bescent; segments lance-ovate. Corolla yellow, large (an inch to an inch and 

 half long), smoothish, hairy within, with the lobes slightly pubescent-ciliate. 

 Stamens very hairy ; anthers with 2 subulate horns at base. Capsule ovoid, acu- 

 minate, pubescent, sulcate opposite the dissepiments. Seeds pitted with honey- 

 comb-like cells, coated with a membranaceous envelope which is rugose-cellular, 

 and produced into winged ridges. 



Bab. Hilly woodlands : common. Ft. July— August, fr. September. 



5. G. clauc a, Eddy. Stem branched, smooth, glaucous ; leaves ob- 

 long-ovate, and lance-oblong, pinnatifid, smooth, petiolate, the upper or 

 branch leaves lanceolate and often entire ; flowers pedunculate ; calyx 

 smooth, segments lance-linear. Becky Bot. p. 268. 



G. flava (sive glauca) 1 Muhl. Catal. p. 58. Not of Willd. &c. 



G. quercifolia. Pursh, Jim. 2. p. 423. Icon, tab. 19. Nutt. Gen. 2. 



p. 48. Bart. Phil. 2. p. 45. Ell. Sk. 2./>. 120. Florul. Cestr. p. 71. 



Lindl. Ency. p. 528. 



Rhinanthus virginicus. Willd. Sp. 3. p. 191. Pen. Syn.1.p. 151. 



Glaucous Gerardia. 



