SCROPIIVLA RIA CEAE. 827 



2. Collinsia violacea Nutt. Violet Collinsia. (I. F. f. 3262.) Similar to 

 the preceding, stem erect, 1. 5-4 dm. high. Leaves lanceolate or oblong- lanceo- 

 late, rather thick, entire or denticulate, obtuse or obtusish, the lower opposite, 

 petioled, the middle similar, sessile, 2-5 cm. long, the floral linear or linear-lan- 

 ceolate; upper whorls 2-5-flowered; corolla 10-12 mm. long, violet; capsule glo- 

 bose, about 4 mm. in diameter. Kans. and Ark. April-June. 



3. Collinsia parviflora Dougl. Small- flowered Collinsia. (I. F. f. 

 3203.) Diffusely branched, very slender, 0.7-4 dm. long. Leaves oblong or 

 lanceolate, mostly obtuse, 1-2.5 cm - long, entire, or sparingly toothed, the lower 

 opposite, petioled, the floral sessile; upper whorls 2-6-flowered; corolla 4-6 mm. 

 long, about twice as long as the calyx, blue or whitish; capsule globose, 2-3 mm. 

 in "diameter. In moist places, Ont. to Br. Col., Mich., Colo., Ariz, and Utah. 

 April- June. 



10. PAULOWNIA Sieb&Zucc. 



A large tree, with the aspect of Catalpa, with broad opposite petioled pubescent 

 leaves, and large violet flowers in terminal panicles. Calyx deeply 5 -cleft, the 

 lobes short. Corolla irregular, the tube elongated, enlarged above, the 5 lobes 

 spreading, somewhat unequal. Stamens 4, didynamous, included; anther-sacs 

 divaricate. Style slender, stigmatic on the inner side. Capsule coriaceous, ovoid, 

 acute, loculicidally dehiscent. Seeds numerous, striate, winged. Flowers expand- 

 ing before the leaves appear. [Named for Anna Paulowna, daughter of the Czar 

 Paul I.] A monotypic Japanese genus. 



1. Paulownia tomentosa (Thunb.) Baill. Paulownia. (I. F. f. 3264.) 

 Leaves broadly ovate, 1.5-4 dm. long, long-petioled, canescent on both sides when 

 young, glabrate above when old; flowers about 6 cm. long, numerous in large erect 

 terminal panicles; pedicels stout, densely tomentose; calyx 5-lobed, the lobes thick, 

 tomentose; corolla slightly irregular, puberulent without; capsule 5 cm. high. 

 Escaped from cultivation N. Y. and N. J. to D. C. and Ga. May-July. 



II. MIMULUS L. 

 Herbs, with opposite leaves. Flowers axillary, solitary, peduncled, pink, 

 violet, or yellow. Calyx prismatic, 5-angled, 5 -toothed. Corolla irregular, its 

 tube cylindric with a pair of ridges on the lower side within, its limb 2-lipped; 

 upper lip 2-lobed; lower lip spreading, 3-lobed, the lobes rounded. Stamens 4, 

 didynamous; anther-sacs divergent, or sometimes confluent at the summit. Style 

 filiform; stigma 2-lamellate. Capsule loculicidally dehiscent, many-seeded, en- 

 closed by the calyx. [Diminutive oimimus, a mimic actor.] About 30 species, 

 natives of America. Besides the following, some 20 others occur in western N. Am. 



Corolla violet, or rarely white ; eastern species. 



Leaves sessile, clasping; peduncles longer than the calyx. 1. M. ritigens. 



Leaves petioled ; peduncles shorter than the calyx. 2. M. alatus. 



Corolla yellow ; western ; two species adventive in the East. 

 Plants glabrous or glabrate. 



Erect; branches spreading ; leaves ovate; flowers 2.5 cm. long. 



3. M. guttatus. 

 Diffuse; leaves nearly orbicular: flowers about 1.2 cm. long. 4. M.Jamesii. 

 Plant villous and viscid, diffuse, musk-scented. 5. M. moschatus. 



1. Mimulus ringens L. .Square-stemmed Monkey-flower. (I. F. f. 

 3265.) Glabrous, perennial by rootstocks; stem erect, 4-sided or somewhat 4-wing- 

 ed, 3-9 dm. high. Leaves oblong, lanceolate, or oblong-lanceolate, acuminate or 

 acute, serrate, auriculate-clasping, or the lower merely sessile, 5-10 cm. long; 

 peduncles 2-5 cm. long in fruit, 2-4 times as long as the calyx; calyx-teeth lanceo- 

 late-subulate; corolla alxjut 2.5 cm. long, the throat narrow, exceeding the calyx, 

 the lower lip puberulent within at the base; fruiting calyx oblong, 12-16 mm. long; 

 seeds oblong, minute, slightly reticulated. In swamps and along streams, N. S. to 

 Va., Tenn., Neb. and Tex. June-Sept. 



2. Mimulus aldtus Soland. Sharp-winged Monkey-flower. {T. F. f. 3266.) 

 Similar to the preceding, stem sharply 4-angled. the angles winged. Leaves ovate, 

 ovate-lanceolate, or oblong, acute or acuminate, dentate-serrate, narrowed at the 

 base, petioled, 5-13 cm. long; petioles 6-25 mm. long; peduncles stout; calyx-teeth 



