FIGWORT FAMILY 689 



About ISO species, of wide distribution, but most numerous in the western United States. Type species, 

 Mimulus ringens L. of eastern North America. 



Capsule symmetrical, soon dehiscent, its pedicel medianly attached. 



Septum of capsule not or only distally splitting; pedicel longer than the calyx (or merely equaling it in 

 Monimanthe). 

 Corolla deciduous, dropping before shriveling, the styles evident on the young capsules; pedicel longer 

 than calyx. 

 Seeds cuneate to base, longitudinally lined; capsule 13-18 mm. long; corolla 40-50 mm. long, purple 



or red. !• Erythranthe. 



Seeds rounded to both ends, smooth or finely striate; capsule, and usually also the corolla, smaller. 

 Calyx cylindric, moderately or not inflated, the lobes permanently straight or nearly so, and 

 the throat not or only slightly plicate; corolla-throat open. 

 Capsule glabrous, wholly enclosed within calyx, the septum not or only slightly splitting 

 distally; calyx-lobes shorter than calyx-tube, the uppermost less than twice length of 

 others, the midrib of each sepal forming a ridge or low wing; corolla yellow or 

 purple. 11. Paradanthus. 



Capsule glandular-puberulent, loosely surrounded by calyx, the septum splitting one-third 

 to one-half its length; sepals unequal in size and unequally joined, the upperrnost 

 longest and the lowest united about one-half their length, all with faint unraised 

 midribs; corolla yellow. III. Mimuloides. 



Calyx sagitally compressed, strongly inflated, the uppermost lobe longest and projecting, the 

 other pairs of lobes plicate, the lowest usually distally upcurving against the lateral 

 pair; corolla yellow, its throat horizontally compressed and the orifice partially or 

 wholly closed by the large hairy ventral ridges; septum of capsule not splitting. 



IV. SiMIOLUS. 



Corolla semipersistent, purple, usually shriveling on the developing capsule; pedicels equaling or 

 slightly longer than calyces. V. Monimanthe. 



Septum of capsule splitting to base; corolla semipersistent, shriveling on the developing capsule; pedicels 

 shorter than the calyces. 

 Calyx 20-40 mm. long, its tube proximally cylindric and distally more campanujate and ridge-angled; 

 corolla 30-65 mm. long, yellow, orange, or red; stems woody, at least at base. 



VI. DiPLACUS. 



Calyx 2-20 mm. long, its tube uniform throughout; corolla 4—45 mm. long, yellow or purple; plants 

 annual. 

 Anthers all developed; calyx-tube plicate, the lobes equal or unequal; stems over 1 cm. tall. 



VII. EUNANUS. 



Anthers of one pair smaller or lacking; calyx-tube plane, the lobes very unequal; stems not over 

 1 cm. tall. VIII. MicROPHYTON. 



Capsule asymmetrical, more woody, tardily or not dehiscent; corolla semipersistent, shriveling on the develop- 

 ing capsule; pedicels shorter than the calyces. IX. Oenoe. 



I. Erythranthe. 



Corolla magenta-purple, its throat rounded and with yellow purple-spotted ridges, its jobes nearly equally 

 spreading; anthers and stigma included. 1. M. Lewisii. 



Corolla vermilion-scarlet, its throat narrow and internally dull yellow, the 2 upper lobes arched and united most 

 of length, the 3 lower lobes widely deflexed-spreading ; anthers and stigma exposed beneath upper 

 corolla-lip. 2. M. cardinalis. 



II. Paradanthus. 



Plants rhizomatose, perennial; corolla yellow. 



Stems elongated; leaf-blades pinnately veined; pedicels less than twice length of subtending leaves. 



Corolla 30-40 mm. long, its throat widely campanulate; leaf-blades dentate. 



3. M. dentatus. 



Corolla smaller, its throat tubular-campanulate; leaf -blades denticulate to finely dentate. 



Calyx-lobes 2-3 mm. long; corolla externally finely glandular-pubescent; stem erect to diffusely 

 decumbent, from often extensive rhizomes. 

 Leaf-blades rounded to narrowed at base; corolla about 25 mm. long. 



Plant with foliage finely pubescent to glabrous, the stem sometimes villose-pubescent; 



leaf-blades denticulate, all petioled. 4. M. moniliformis. 



Plant more hairy; leaf -blades sharply toothed, at least the upper obscurely petioled or 

 sessile. 

 Anthers glabrous; leaf-blades tending to ovate; plant erect or ascending. 



5. M. macranthus. 



Anthers finely pubescent; leaf-blades tending to oblong; plant lax, diffuse. 



6. M. inodorus. 



Leaf-blades truncate to rounded at base, all petixDled; corolla about 20 mm. long. 



7. M. moschatus. 



Calyx-lobes 1-1.5 mm. long; corolla 15-18 mm. long, externally glabrous; stem procumbent, from 

 slender rhizomes that form corm-like resting buds. 8. M. jungcrmannioides. 



Steins short; leaf-blades palmately veined; pedicels more than twice length of subtending leaves and often 

 exceeding that of the stem. 

 Leaf-blades linear-oblanceolate, the lower oblanceolate; corolla densely hirsute on ventral side of orifice; 

 plants densely cespitose. 9. M. linearifolius. 



Leaf-blades oblanceolate-oblong, nearly uniform throughout; corolla loosely hirsute on ventral side of 

 orifice; plants lower, not truly cespitose. 10. M. primuloides. 



Plants not rhizomatose; roots annual (or perhaps sometimes biennial). 

 Capsule included within calyx, which is 4—12 mm. long. 

 Anthers hairy; leaf -blades sessile or nearly so. 



Stem and leaves glabrous or with glandless hairs; leaf -blades oval, 5-veined. 



Corolla 8-9 mm. long, yellowish or purple. 11. M . inconspicuus. 



Corolla 13-17 mm. long, purple. 



Pedicels 5-12 mm. long; calyx glandular-puberulent; ventral ridges within corolla sharp, 

 yellovv', finely pubescent. 12. M. Grayi. 



Pedicels 10-23 mm. long; calyx glabrous; ventral ridges within corolla less pronounced, 

 the whole platform of the lower lip yellow and pilose. 



13. M. acutidens. 



