GENUS Io, FIGWORT FAMILY. 189 
3. Collinsia tenélla (Pursh) Piper. 
Small-flowered Collinsia. Fig. 3773. 
Antirrhinum tenellum Pursh, Fl. Am. Sept. 
421. 1814, 
Collinsia parviflora Dougl.; Lindl. Bot. Reg. 
pl. 1082, 1827. 
C. tenella Piper, Contr. Nat. Herb. 11: 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, 3’-1’ 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 3-4” long, 
about twice as long as the calyx, blue or 
whitish, the throat longer than the limb; 
capsule globose, 1-12” in diameter, little 
shorter than the lanceolate calyx-lobes. 
In moist places, Ontario to British Colum- 
bia, Michigan, Colorado, Arizona and Utah. 
April-June. 
< SS 
iz. PAULOWNIA Sieb. & Zucc. Fl. Jap. 1: 25. pl. ro. 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 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, 
slightly thickened toward the summit, stigmatic on the inner side. Capsule coriaceous, ovoid, 
acute, loculicidally dehiscent. Seeds numerous, striate, winged. Flowers expanding before 
KEP : the leaves appear. [Named for Anna Paulowna, daughter 
ie of the Czar Paul I.] 
A monotypic Japanese genus. 
1. Pauiownia tomentosa (Thunb.) Baill. Pau- 
lownia. Fig. 3774. 
Bignonia tomentosa Thunb. Fl. Jap. 252. 1784. 
Paulownia imperialis Sieb. & Zucc. Fl. Jap. 1: 27. 1835. 
Paulownia tomentosa Baill. Hist. Pl. 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 23’ long, numerous in large erect 
4 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. Pl. 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. 
