Genus io. 



FIGWORT FAMILY. 



3. Collinsia tenella (Pursh) Piper. 

 Small-flowered Collinsia. Fig. 3773. 



Antirrhinum tenellum Pursh, Fl. Am. Sept. 



421. 1814. 

 Collinsia parviflora Dougl. ; Lindl. Bot. Reg. 



pi. 1082. 1827. 

 C. tenella Piper, Contr. Nat. Herb. II: 496. 



1906. 



Puberulent, at length diffusely branched; 

 stems very slender, 3-15' long. Leaves 

 oblong or lanceolate, mostly obtuse at the 

 apex and narrowed at the base, i'-l' long, 

 entire, or sparingly toothed, the lower op- 

 posite, sometimes broader, petioled, the 

 floral sessile, opposite or verticillate ; upper 

 whorls 2-6-flowered ; pedicels commonly 

 longer than the flowers; corolla z"-4," long, 

 about twice as long as the calyx, blue or 

 whitish, the throat longer than the limb ; 

 capsule globose, l"-li" in diameter, little 

 shorter than the lanceolate calyx-lobes. 



In moist places, Ontario to British Colum- 

 bia, Michigan, Colorado, Arizona and Utah. 

 April-June. 



11. PAULOWNIA Sieb. & Zttcc. Fl. Jap. i : 25. pi. 10. 1835. 

 A large tree, with the aspect of Catalpa, with broad opposite entire or 3-lobed, petioled 

 pubescent leaves, and large violet flowers in terminal panicles. Calyx deeply S-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, 

 slightly thickened toward the summit, stigmatic on the inner side. Capsule coriaceous, ovoid, 

 acute, loculicidally dehiscent. Seeds numerous, striate, winged. Flowers expanding before 



the leaves appear. [Named for Anna Paulowna, daughter 

 of the Czar Paul I.] 



A monotypic Japanese genus. 



i. Pauiownia tomentosa (Thunb.) Baill. Pau- 

 lownia. Fig. 3774. 



Bignonia tomentosa Thunb. Fl. Jap. 252. 1784. 

 Pauiownia imperialis Sieb. & Zucc. Fl. Jap. 1 : 27. 1835. 

 Pauiownia tomentosa Baill. Hist. PI. 9: 434. 1888. 



A tree with thin flaky bark, reaching a maximum 

 height of about 70 and a trunk diameter of 4, the 

 branches stout, spreading. Leaves broadly ovate, 6' 15' 

 long, 4'-8' wide, long-petioled, canescent on both sides 

 when young, glabrate above when old, the petioles 

 terete; flowers about 2.Y long, numerous in large erect 

 terminal panicles; pedicels stout, densely tomentose; 

 calyx 5-lobed, the lobes thick, tomentose ; corolla slightly 

 irregular, puberulent without; capsule 2' high, 1' in 

 diameter. 



Escaped from cultivation, southern New York and New 

 Jersey to Georgia. May-July. 



12. MIMULUS L. Sp. PI. 634. 1753. 

 Erect or decumbent herbs, with opposite mostly dentate leaves. Flowers axillary, soli- 

 tary, peduncled, pink, violet, or yellow, usually showy. Calyx prismatic, 5-angled, 5-toothed, 

 the upper tooth usually the largest. Corolla irregular, its tube cylindric with a pair of ridges 

 on the lower side within, its limb 2-lipped ; upper lip erect or reflexed, 2-lobed ; lower lip 

 spreading, 3-lobed, the lobes rounded. Stamens 4, didynamous, inserted on the corolla-tube; 

 anther-sacs divergent, or sometimes confluent at the summit. Style filiform; stigma 2-lamel- 

 late. Capsule oblong or linear, loculicidally dehiscent, many-seeded, enclosed by the calyx. 

 [Diminutive of mimus, a mimic actor.] 



About 40 species, natives of America. Besides the following, some 30 others occur in the 

 western United States and British Columbia. Type species: Mimulus ringens L. 

 Corolla violet, or rarely white ; eastern species. 



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



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



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



Plants glabrous or glabrate. 



