SCROPHULARIACEAE 171 



Branches of thyrpe spreading. 1. P. Digitalis. 



Thyrse spike-like. 2. P. tubiflorus. 



1. P. Digitalis (Sweet) Nutt. l°-4° high, glabrous, except the in- 

 florescence : leaves ovate-oblong to lanceolate, denticulate, the lower 

 petioled, the upper clasping : thyrse panicle-like, spreading : corolla 

 abruptly inflated, V long, white. — Common in woods and low grounds. 

 May-July. 



2. P. tubiflorus Nutt. Resembles the last : thyrse narrow, spike- 

 like : corolla not abruptly inflated, V long. — Occasionally adventized at 

 SheflSeld, Wayne City and Courtney. May-July. 



6. COLLINSIA Nutt. 



Annual herbs with opposite leaves and flowers verticillate in their axils. 

 Upper lip of corolla 2-cIeft, the lower 3-cleft, its middle lobe keeled and 

 enclosing the stamens and style. 



1. C. verna Nutt. Blue-eyed Mary. 10^-20^ high, glabrous : leaves 

 ovate, toothed, the lower petioled, the upper sessile : corolla 8^^ long, its 

 lower lip blue, the upper white. — Locally common in rich woods, Shef- 

 field, Washington Park, Dodson, Grain Valley. April-May. 



7. MIMULUS L. Monkey Flower. 

 Herbs with opposite leaves and axillary peduncled flowers. Upper lip 

 of corolla erect, 2-lobed, the lower spreading, 3-lobed. 



Leaves sessile. L M. ringens. 



Leaves petioled. 2. M. alotus. 



1. M. ringens L. Glabrous perennial, l°-2° high ; leaves lanceolate, 

 serrate : peduncles longer than the calyx : corolla violet, 12''^ long. — 

 Common in moist grounds. June-October. 



2. M. alatus Soiand. Resemble the last : stem winged : peduncles 

 shorter than the calyx. — Common in moist grounds. June-0ct6ber. 



8., CONOBEA Aubl. 



Herbs with opposite leaves and small pedicelled axillary flowers. Calyx 

 segments equal. Upper lip of corolla 2-lobed, the lower 3-lobed. 



1. C. multifida (Michx. ) Benth. River Weed. Diffusely spreading, 

 2''-8'' high, short-pubescent : leaves pinnatifid, petioled : corolla bluish, 

 2^^ long. — Often common in wet sandy soil, especially along streams. 

 June-October. 



9. MONNIERA P. Br. 



Herbs with opposite leaves and axillary flowers. Upper division of 

 calyx broader than the other. Corolla (in ours) 2-lipped, the upper lip 

 2-lobed, the lower 3-lobed. 



1. M. rotundlfolia Michx. Water Hyssop. Stems creeping and float- 

 ing, hairy : leaves ovate-orbicular, obtuse, entire : flowers white, y^ 

 long. — In swamps, Shefiield (abundant), Greenwood, Lake City, Court- 

 ney. May-October. 



