CALIFORNIA ACADEMY OF SCIENCES. 10 » 



ridges on the lower side: limb with lobes rarely all much 

 alike in form and size, but the two upper frequently smaller 

 and reflexed. Stamens 4: style glabrous; stigma bilamelar; 

 the lobes equal, ovate or orbicular. Capsule obtuse, not 

 surpassing the calyx; valves membranaceous, tardily separ- 

 ating from the united, columnar central placentie. — Herbs 

 seldom resinous- but commonly albuminous-viscid. Herbage 

 mostly light green. Stem and branches in many species 

 flaccid and decumbent or spreading, often rooting at the 

 joints. Flowers in the original species blue; in most others 

 yellow, with or without crimson or purple dots; the upper 

 lip white in one species which is in other respects anoma- 

 lous.— Linne, Gen. No. 783; Benth. in DC. Prod. X. 368; 

 Mimulus $ Eumimulus, Benth. & Hook. Gen. II. 947: Gray, 

 Proc. Am. Acad. XI. 97; Bot. Cal. I. 566. and Svn. Fl. II. 

 Part I. 276. 



A genus which, with Diplacus and Euuanus excluded, still 

 seems sufficiently polymorphous, when including plants of 

 such widely different aspect as the blue-flowered Atlantic, 

 the red- and yellow-flowered Pacific species and M. bicolor, 

 the corolla of which is one half yellow and the other pure 

 white. The following synopsis includes all the known spe- 

 cies of the United States and the regions northward. 



$ 1. Eumimulus, Gray, (much restricted). Stems qwul- 

 rangidar, stout, erect and mostly simple: herbage deep green, glab- 

 rous and neither glutinous itnr slimy: leaves feather-veined. — At- 

 lantic perennials with blue flowers, varying to ivhite. 



M. ringens, Linne. 



Leaves oblong or lanceolate, serrate, closely sessile by an 

 auriculate-clasping base: pedicels longer than the large 

 flower.— Hort. Ups. 176, t. I; Lam, 111. t. 523; Gray, Svn. 

 Fl. 1. c. 



Canada to Iowa and southward to Gulf of Mexico. 



M. alatus, Solander. 



Stem wing-angled : leaves ovate to ovate-lanceolate, taper- 



