SCROPHULARIACEAE (FIGWORT FAMILY) 453 



ascending: pedicels 2-3 times as long as the calyx: calyx campanulate; the 

 lobes triangular-subulate, half as long as the tube or less: corolla purple, about 

 12 mm. long: capsule globose, 4-6 mm. in diameter. G. tenuifolia macrophylla 

 Benth. From the Rocky Mountains to the Mississippi. 



12. MIMULUS L. MONKEY FLOWER 



Herbs with opposite leaves and mostly showy yellow or red flowers solitary 

 and axillary or in a terminal raceme. Calyx prismatic, 5-angled and 5-toothed. 

 Corolla tubular to funnelform, with strongly bilabiate limb or the lobes 

 nearly equal, a pair of bearded ridges extending down the lower side of the 

 throat. Stamens 4, the fifth entirely wanting. Stigma mostly of 2 flat lobes 

 closing together when irritated. Capsule dehiscent by both sutures or on one 

 side only, or cartilaginous and indehiscent. Seeds many. 



Flowers reddish or purple. 



Stigmas funnelform . . . . . . . . .1. M. nanus. 



Stigmas 2-lipped. 



Flowers small, less than 1 cm. long . . . . . . 2. M. rubellus. 



Flowers large, 3 cm. or more long . . . . . . 3. M. Lewisii. 



Flowers yellow; stigmas 2-lipped. 

 Perennials. 



Calyx oblique, inflated in fruit, the upper tooth largest. 



Calyx-teeth acute; stem not rooting at the nodes . . . 4. M. Langsdorfii. 

 Calyx-teeth obtuse; stem rooting at the nodes . . . . 5. M. Geyeri. 



Calyx neither oblique nor inflated, the teeth subequal . . . 6. M. moschatus. 

 Annuals. 



Calyx oblique, inflated in fruit . . . . . . . 7. M. Hallii. 



Calyx neither oblique nor inflated 8. M. floribundus. 



1. Mimulus nanus Hook. & Arn. Bot. Beech. 378. 1840. Glandular or 

 viscid; stem stoutish, 2-10 cm. high, simple, or branched from the base: 

 leaves oblong or ovate to lanceolate, entire or obscurely toothed, contracted 

 at base; the lower ones petioled, including the petiole 8-25 mm. long: calyx- 

 teeth broadly lanceolate, acute: corolla rose-purple with yellow and dark 

 purple in the throat; the limb 8-12 mm. broad, obviously bilabiate: capsule 

 acuminate, surpassing the calyx; the valves chartaceous. [M. Tolmiei (Benth.) 

 Rydb.] Gravelly hills; western Wyoming to California and Washington. 



2. Mimulus rubellus Gray, Torr. Bot. Mex. Bound. 116. 1859. Simple or 

 branched from the base, 5-20 cm. high: leaves spatulate-oblong to linear, 

 9-18 mm. long, commonly equaling the pedicels; the lower sometimes obo- 

 vate or ovate: calyx-teeth short and obtuse: corolla 6-8 mm. long, a third 

 longer to twice the length of the calyx, rose-color, sometimes yellow vary- 

 ing or changing to crimson-purple; the throat broad and open: stigma bi- 

 lamellar. (M. gratioloides Rydb. Bull. Torr. Bot. Club 28: 27. 1901.) New 

 Mexico to Montana. 



3. Mimulus Lewisii Pursh, Fl. Am. Sept. 427. 1814. Pubescent and more 

 or less viscid; stems numerous from a perennial root, 3-6 dm. high, simple: 

 leaves oblong-ovate to lanceolate, denticulate, mostly acute or acuminate, 

 3-7 cm. long: peduncles longer than the leaves: calyx prismatic-campanulate, 

 15-20 mm. long, the triangular teeth short-acuminate and very acute: corolla 

 rose-red or purplish, about 3 cm. long, with broad throat and bilabiate limb, 

 sparingly bearded in the throat: stamens not exserted: stigmas oblong: 

 capsule oblong; seeds with a dull and loose coat, longitudinally wrinkled. 

 Along mountain streams in our range and far westward. 



3a. Mimulus Lewisii tetonensis A. Nels. Bot. Gaz. 34: 31. 1902. Smaller, 

 more granular-glandular: calyx-lobes narrowly linear-acuminate: corolla 

 smaller, white or ochroleucous. Teton Mountains. 



4. Mimulus Langsdorfii Sims, Bot. Mag. pi. 1501. 1812. Erect perennial 

 with light-green herbage, glabrous or minutely pubescent; stems terete, 2-8 

 dm. high, usually paniculately branched: leaves orbicular or ovate, the blade 

 2-5 cm. long, dentate or denticulate, often sublyrate, petioled: floral bracts 

 4-12 mm. long, connate-clasping: pedicels slender, 2-3 cm. long: calyx cam- 



