FIGWORT FAMILY 693 



Blades narrower, obtuse to acute; corolla-throat narrower. 



Lobes of calyx obscurely glandular-pubescent, ovate to lanceolate or distally subulate- 

 caudate; corolla purple; plants obscurely glandular, not strong-scented. 



Corolla 13-20 mm. long, pilose only or mainly on lower side of orifice; anthers 

 yellow or purplish, hardly exserted; leaf -blades elliptic-oblanceolate, finely 

 pubescent. 75. M. nanus. 



Corolla 9-12 mm. long, pilose proximally on all lobes; anthers purple, exserted 

 beneath upper lip of corolla; leaf-blades oblanceolate. glabrescent. 



76. M. Jepsonii. 



Lobes of calyx strongly glandular-pubescent, ovate-lanceolate to linear, acute to attenuate; 

 plants evidently glandular-pubescent, often or usually strong-scented. 



Corolla 10-15 mm. long, yellow (or rarely purple); calyx-tube not plicate-angled, the 

 lobes equal or nearly so. 77. M. mephiticus. 



Corolla 15-22 mm. long; calyx-tube plicately ridge- to wing-angled, the uppermost 

 lobe longest. 



Anthers at orifice of corolla-throat (or those of the longer filaments slightly 

 exserted) ; corolla yellow or purple, in anthesis two and a half to three 

 times the length of the calyx. 78. M. densus. 



Anthers of both pairs usually somewhat exserted beneath upper lip of corolla; 

 corolla usually purple and 3—4 times the length of calyx. 



79. M. coccineus. 



Calyx-lobes strongly unequal, the uppermost one about twice the length of the lowest pair; anthers 

 glabrous; corolla purple. 80. M. Johnstonii. 



Stigmas and anthers included in the corolla-throat, the former not or barely reaching the bases of the 

 corolla-lobes. 



Corolla purple (or also yellow in M. Whitneyi), not over 30 mm. long, the throat cylindric to narrowly 

 campanulate (widest in M. platylaemus) ; uppermost lobe not over twice the length of the other 

 calyx-lobes. 



Corolla-lobes and stigmas equal or nearly so. 



Calyx-tube at maturity nearly plane, the ridges minutely pubescent and narrower than the 

 scarious intervening tissue, the lobes lanceolate to nearly subulate; leaf-blades oblanceo- 

 late. 



Corolla 9-17 mm. long, yellow with reddish markings to wholly purple. 



81. M. Whitneyi. 



Corolla 5-7 mm. long, purple (or with yellow lobes). 82. M. leptalcus. 

 Calyx-tube strongly plicate, the raised glandular-pubescent to -hirsute ridges wider than the 

 pale intervening tissue, the lobes ovate to cuspidate; leaf-blades oblong-lanceolate to 

 narrowly elliptic. 

 Inner face of corolla-lobes glabrous; bracts and leaf-blades oblanceolate to oblong-lanceo- 

 late, obtuse to acute. 

 Anthers glabrous; corolla with widely spreading lobes, the diameter of the limb 

 from two-thirds to nearly equaling the length of the tube and throat; bracts 

 shorter than or equaling the fruiting calyces. 



83. M. Fremontii. 



Anthers hairy; corolla-lobes less abruptly spreading, the diameter of the limb one-half 

 to two-thirds the length of the fruiting calyces. 



Stem finely glandular-pubescent, and usually also villulose with glandless hairs 

 proximally; bracts oblanceolate; calyx-lobes distally caudate-subulate; 

 flowers mostly crowded in dense terminal racemes. 



84. M. constrictus. 



Stem glandular-hirsute nearly or quite throughout; bracts narrowly elliptic- 

 lanceolate; calyx-lobes lanceolate, acute; flowers uniformly disposed, the 

 upper not crowded. 

 Calyx 6-9 mm. long; corolla 13-20 mm. long; leaf-blades narrowly oblong- 

 lanceolate, mostly slightly petioled. 



85. M. Layneae. 



Calyx 9-12 mm. long; corolla 20-25 mm. long; leaf-blades nearly elliptic- 

 lanceolate, sessile. 86. M. viscidtis. 



Inner face of corolla-lobes pilose; bracts and leaf-blades elliptic-lanceolate to nearly 



elliptic. 



Lowest pair over one-half the length of uppermost calyx-lobe; corolla 20-25 mm. long, 



the limb abruptly widely spreading (smaller and with less spreading limb in 



M. Bigelovii panamintensis) ; bracts and leaves acuminate to_ cuspidate, finely 



glandular-pubescent. 87. M. Bigelovii. 



Lowest pair less than or about one-half the length of uppermost calyx-lobe; corolla 

 15-20 mm. long, the limb less strongly spreading; bracts and leaves obtusely 

 rounded to acute, villose-pubescent with some hairs gland-tipped. 



80. M. Johnstonii. 



Corolla-lobes unequal, the lower obviously longer (or hardly so in M. Rattanii and M. Bolan- 

 dcri) ; stigmas unequal, the lower longer and decurved. 

 Plicae of calyx thin, not strongly contrasting with intervening pale surface, the lobes low, 

 acute to acutish or the lateral rounded; corolla 15-20 mm. long. 



88. M. Torreyi. 



Plicae of calyx thick, dark green and more conspicuously contrasting with intervening pale 

 surface. 



Lower stigma rounded, wider than long; bracts (except lowermost) shorter than calyces; 

 inflorescence strongly secund. 

 Calyx-lobes acute-acuminate; stem with only spreading hairs. 



Corolla 10-13 mm. long, pubescent within on lower side; hairs of stem all con- 

 spicuously gland-tipped. 89. M. brachiatus. 



Corolla 15-17 mm. long, glabrous within; hairs of stem mostly glandless, but 

 some obscurely gland-tipped. 90. M. subsecundus. 



Calyx-lobes truncately rounded to acutish; corolla 8-10 mm. long, glabrous within; 

 hairs of stem partly reflexed and glandless and partly longer, spreading and 

 conspicuously gland-tipped. 91. M. Rattanii. 



Lower stigma elongated, many times exceeding the upper one; corolla glandular-puberulent 



