692 SCROPHULARIACEAE 



Leaf-blades, at least the lower, cut- or pinnatifid-lobed at base, the bracts usually more 

 hirsuite than the foliage-leaves; plants to 5 dm. tall or more, the stout sterns erect 

 or slightly decumbent at base. 

 Lateral and lower calyx-lobes acute, projecting, becoming upcurved toward or against 

 the uppermost one. 

 Corolla 15-35 mm. long, two to three and a half times length of calyx, its 

 orifice closed by the uparching palate; calyx 12-22 mm. long. 



54. M. lyratus. 



Corolla 5-10 mm. long, less than twice length of calyx, its orifice only partially 

 closed by palate; calyx 8-14 mm. long. 



55. M. micranthus. 



Lateral and lower calyx-lobes truncate or mucronulate, at maturity only slightly 

 upcurved against the stout and relatively blunt uppermost one; corolla two to 

 two and a half times length of calyx, its orifice only partially closed by the 

 palate. 56. M. arvensis. 



Pedicels with gland-tipped hairs or glabrous (if the latter, with foliage or calyces somewhat 

 glandular). 

 Corolla more than twice as long as calyx, relatively wide and strongly 2-lipped. 

 Fruiting calyx about two-thirds as wide as long; corolla 18-45 mm. long. 



Leaf-blades from rounded to narrowed at base, rarely pinnatifid-lobed proxi- 



mally; plant green in drying. 57. M. guttatus. 



Leaf-blades rounded-cordate and usually with slender lobes proximally; plant 

 darkening in drying. 58. M. laxus. 



Fruiting calyx as wide as long; corolla 15-20 mm. long; plant very slender. 



59. M. platycalyx. 



Corolla less than or about twice as long as calyx, narrower and with less developed 

 palate (sometimes varying to two and a half times calyx in M. cordatus). 

 Fruiting calyx 11-14 mm. long; corolla 12-15 mm. long; leaf-blades rounded to 



cordate at base. 60. M. cordatus. 



Fruiting calyx 7-9 mm. long; corolla 5-10 mm. long; leaf-blades truncately rounded 

 at base. 61. M. longulus. 



Bracts widely connate; plants glaucous. 62. M. glaucescens. 



V. MONIMANTHE. 

 Corolla S-6 mm. long; plant glandular-pubescent. 63. M. Breweri. 



VI. DiPLACUS. 



Plant glandular-pubescent, the stems suffrutescent at base; corolla yellow, externally glandular-pubescent, its 



lobes all about equally joined; leaf-blades irregularly dentate. 64. M. Clevelandii. 



Plant glutinous, the stems extensively woody; corolla externally glutinous, its upper lobes united one-third to 

 one-half their length; leaf-blades dentate to entire. 

 Corolla yellow or orange, its throat campanulate, straight or slightly decurved; anthers, and usually also the 

 stigmas, included. 

 Calyx loosely hirsute; corolla salmon-colored, its lobes truncate and broadly retuse; lower surface of 

 leaf-biades with relatively long mostly unbranched hairs; pedicels 2-7 mm. long. 



65. M. longiflorus. 



Calyx glandular-puberulent or glabrate; lower surface of leaf-blades with branched hairs or glabrotis; 

 pedicels 6-1 7 (-25) mm. long. 

 Tube of calyx distally only slightly widened, the calyx 20-30 mm. long; corolla-throat narrowly 

 campanulate, about as long as the narrow basal tube; plant more than 4 dm. tall. 

 Corolla orange, mostly 35-45 mm. long, its lobes rounded to retuse (or the upper slightly 

 bilobed) ; leaf-blades finely serrate, stellate-pubescent beneath. 



66. M. aurantiacus. 



Corolla pale yellow, its lobes emarginate to bilobed; leaf-blades slightly serrulate to entire. 



Leaf-blades acutish, linear-lanceolate, stellate-pubescent to glabrous beneath; corolla 

 mostly 45-55 mm. long, its lobes notched less than one-fourth their depth. 



67. M. linearis. 



Leaf-blades obtuse to rounded, elliptic-oblong, glabrous beneath; corolla 50—65 mm. long, 

 its lobes notched one-fourth to one-half their depth. 



68. M. bifidus. 



Tube of calyx distally inflated, the calyx becoming 35—40 mm. long; corolla-throat widely cam- 

 panulate, about one-half the length of the narrow basal tube; plant 2-4 dm. tall. 



69. M. aridus. 



Corolla red, its lobes scarlet, its throat nearly cylindric and decurved; stigmas, and anthers of the longer 

 filaments, exserted. 

 Leaf-blades linear-lanceolate, acute to acutish, stellate-pubescent to eventually glabrate beneath; 



corolla only slightly decurved. 70. M. puniceus. 



Leaf-blades ovate-oblong, roimded at apex, glabrous beneath; corolla more slender and strongly decurved. 



71. M. Flemingii. 



VII. EUNANUS. 



Corolla tubular-campanulate, the expanding throat clearly distinguishable from the narrower tube and hairy 

 within ventrally, the upper lobes arched and united farther than the lower ones. 

 Stigmas, and usually at least the anthers of the longer filaments, exserted. 



Calyx-lobes equal or somewhat unequal, the uppermost less than twice the length of the lowest pair; 

 anthers usually hairy. 

 Leaf-blades and bracts elliptic, denticulate to dentate, somewhat pinnately veined; calyx-lobes 



acute to obtuse; corolla purple. 72. M. cUvicola. 



Leaf-blades and bracts entire, longitudinally veined; calyx-lobes with attenuate-subulate tips. 



Blades elliptic or elliptic-ovate; corolla purple, the throat campanulately inflated, distally 

 expanding. 

 Corolla 20-25 mm. long; calyx-lobes ovate-acuminate or -cuspidate; bracts acute to acumi- 

 nate; stem 0.5-3 dm. tall, leafy. 73. M. Casickii. 

 Corolla 10-13 mm. long; calyx-lobes uniformly tapering; bracts obtuse to broadly rounded; 

 stem less than 0.5 dm. tall, bare below the single leaf-cluster. 



74. Af. microphyton. 



