122 SCROPHULARIACEAE. 



SCROPrjULARIA L. Coarse perennials, with opposite leaves, and small 

 greenish purple cymose flowers. Calyx 5-parted. Corolla, short, 5-lobed, 4 

 lobes ereet, the fifth reflexed; tube globose. Stamens included, 4, and a rudi- 

 mentary fifth on the upper side of the throat of the corolla. 



S. marylandica L. F'mwort. Stem 3-7 feet high, 4-angled, glabrous, 

 branching: leaves large, ovate or ovate-lanceolate, thin, acuminate, sharply 

 serrate; cymes in a slender terminal thyrse-like panicle; corolla brownish, 

 purple within; sterile stamen deep purple. Woods; June-August; common. 



PENTSTEMON Solander. Keajrd-tongue. Perennials, simple or branch- 

 ed- from the base. Leaves opposite, the upper sessile, the lower petioled. 

 ' Flowers thyrsoid or raeemose-panicled, showy. Calyx 5-parted. Corolla tub- 

 ular, often inflated or campanulate, usually 2-lipped, upper lip 2-lobed, lower 

 3-lobed. Stamens 5, 4 antheriferous, declined below, ascending above, the 

 5th sterile. Capsule ovoid-conical, with many angular steds. 



P. pubescens Solander. Stem 1-3 feet high, downy-pubescent; leaves ob- 

 long to lanceolate, denticulate or entire, radical leaves ovate or oblong; flow- 

 ers in a narrow panicle; corolla pale-purple, gradually dilated, throat nearly 

 closed by 2-bearded folds from the lower lip; sterile filament bearded. Hills 

 and bluffs; June; frequent; Muscatine, Henry, Appanoose, and Lyon coun- 

 ties; reported from Scott county. ( P. hirxutus (L.) Willd.) 



P. digitalis (Sweet) Nutt. Stein 2-5 feet high, glabrous; leaves ovate- 

 lanceolate, usually serrulate; the basal oval or oblong; corolla white, in- 

 flated, campanulate, throat open, beardless; sterile filament thinly bearded. 

 Woods; June; frequent; Muscatine, Louisa, Lee, Johnson, Appanoose, and 

 Lyon counties. 



P. gracilis Nutt. Stem 0-18 inches high, glabrous or nearly so below; 

 basal or lower leaves linear-oblong or spatulate, denticulate or entire, the 

 upper linear-lanceolate or lanceolate, denticulate; inflorescence glandular- 

 pubescent; corolla purple. Prairies; May-June; infrequent; Lyon county. 



P. grandiflorus Nutt. Stem 2-3 feet high, glabrous, glaucous; eauline 

 leaves oblong or oval, thick, entire clasping or perfoliate; the basal ohovate; 

 corolla large, campanulate, nearly regular, lavender-blue; sterile filament in- 

 curved at the apex, puberulent. Sandy soil; June-August; not common; 

 Muscatine, Louisa. Fremont. Pottawattamie, and Lyon counties; reported 

 from Dubuque, Delaware, Black- Hawk, and Woodbury counties. 



CHELONE L. Turti.e-head. Erect perennials, with angled stems, and 

 opposite petioled leaves. Flowers axillary, nearly sessile,, in clusters; calyx 

 with three bracts, 5-parted, segments ovate or lanceolate. Corolla tubular, 

 inflated, 2-lipped. much longer than the calyx; upper lip arched, notched at 

 the apex or entire, lower lip 3-lobed, bearded in the throat. Stamens 4, with 

 woolly filaments and anthers, fitth stamen rudimentary. Seeds with a mem- 

 branous wing. 



C. glabra L. Stem slender, 1-5 feat high; leaves sessile or short-petioled, 

 narrowly lanceolate, tapering both ways, appressed serrate; flowers cluster- 

 ed, white or roseate, bracts not ciliate. Wet places; infrequent; July-Sep- 

 tember; Winneshiek, Allamakee, Dubuque, Muscatine, and Johnson counties- 

 reported from Fayette county. 



C. obliqua L. Stem slender, 1-4 feet high; leaves broadly lanceolate or ob- 

 long, incisely serrate; flowers rose-purple, bracts ciliolate. Wet grounds, in 

 thickets; August-September; infrequent; Muscatine, Des Moines, and Jeffer- 

 son counties. 



