May, 1921] The Fig-worts of Ohio 225 



terminal panicles. Stamens four, didynamous, the lateral ones 

 shorter, the fifth one absent. Capsule ovoid, acute. Seeds 

 numerous, winged. 



1. Pauiownia tomentosa (Thunb.) Baill. Paulownia. 



A tree, with thin, flaky bark, up to 70 ft. high, with a trunk diameter 

 of 4 ft., and with broad, heart-shaped leaves, persistently pubescent 

 beneath, 6-15 in. long, 4-8 in. wide, and long, often hollow petioles. 

 Sepals 5, very thick and tomentose; corolla glandular-pubescent on the 

 outside; ovulary densely glandular-pubescent. May-July. Cultivated 

 in Southern Ohio, and escaped in Lawrence County. 



7. Mimulus L. Monkey-flower. 

 Erect or creeping, perennial herbs, with opposite, usually 

 dentate leaves, and showy, pink, violet, or yellow, peduncled 

 flowers, solitary in the axils, or raceme-like. Calyx prismatic, 

 5-toothed or lobed. Corolla tubular, 2-lipped. Stamens 4, 

 didynamous, all anther-bearing. Capsule many-seeded, 

 enclosed by the calyx. 



1. Leaves sessile, clasping, prevailingly lanceolate; peduncles considerably 

 longer than the calyx M. ringens. 



1. Leaves petioled, prevailingly ovate; peduncles mostly shorter than the 

 calyx M- alatus. 



1. Mimulus ringens L. Square-stemmed Monkey-flower. 

 Perennial, glabrous plant, with erect, 4-sided, or somewhat 4-winged 



stem, often considerably branched, 1-3 ft. high. Leaves oblong or 

 lanceolate, acuminate at the apex, clasping by a heart-shaped base, or 

 the lower ones merely sessile, 2-4 in. long, 3^-1 in. wide. Flowers 

 solitary and axillary; peduncles considerably longer than the calyx; 

 corolla 1-13^ in. long, violet, or rarely white, with 2 yellow spots near 

 the narrow throat, the upper lip erect, the lower spreading; calyx lobes 

 lanceolate. In swamps, along streams, and in wet places. June- 

 September. General. 



2. Mimulus alatus Soland. Sharp-winged Monkey-flower. 



Perennial, glabrous, similar to the preceding species, but with 

 sharply 4-angled stem, the angles more or less winged. Leaves ovate, 

 ovate-lanceolate, or oblong, narrowed at the base, petioled, 2-5 in. long, 

 yi-XYi in. wide; petioles \i-\ in. long. Calyx-lobes setaceous-tipped. 

 Peduncles shorter than the calyx. In swamps and wet places. June- 

 September. Rather general. 



8. Conobea Aubl. Conobea. 

 Low, branching herbs, with opposite, pinnately-parted or 

 serrate leaves, and small, blue or white flowers, solitary or two 

 together in the axils. Calyx of 5, equal, linear sepals, free 

 nearly to the base. Corolla 2-lipped. Stamens 4, fertile, 

 didynamous, included. Anther-sacs parallel. Seeds numerous. 



