FIGWORT FAMILY 767 



Basal leaf-l)lade.s lincar-obla.noeolate. 



Throat of the curoUa I'muK llorin, glandular-puberulent with- 

 in; hinb ample; lower Hj) almost equalling the upper; sterile 

 stamen bearded at the end. 65. P. puhrrulentus. 



Throat of the corolla almost cylindric; limb small; lower lip 

 shorter than the upper, pubescent witliin; sterile fila- 

 ment bearded at least half its length 

 Stem-leaves narrowly linear; calyx-lobes not scarious- 



margined. 66. P. oreganus. 



Stem-leaves narrowly lanceolate; calyx-lobes usually 

 with narrow scarious margins. 67. P. radicosus. 

 Basal leaf-blades oval or ovate. 68. P. humilis. 



XIII. L.VRICIFOLII. 



Calyx-lobes distinctly scarious-margined ; lower lip of the corolla sUghtly hairy within 



or glabrous. 69. P. exilifolius. 



Calyx-lobes not scarious-margined; lower lip of the corolla densely bearded within. 



70. P. laricifoiius. 

 XIV. Ambigui. 

 Corolla-tube over 1 cm. long. ^ 71. P. ambiguus. 



Corolla-tube about 5 mm. long. 72. P. Thurberi. 



XV. C.\ESPITOSI. 



Leaf-blades obovate, spattilate, or broadly oblanceolate. 



Leaves green and glabrous or slightly puberulent; calyx-lobes oblong-lanceolate. 



73. P. suffrutescens. 

 Leaves densely graj-ish or wliitish puberulent; calyx-lobes lanceolate. 



Calyx-lobes luiear-lanceolate, over 5 mm. long; plant grayish puberulent. 



74. P. capspitosus. 

 Calyx-lobes broadly lanceolate, scarcely 5 mm. long; plant almost white. 



75. P. Thompsoniae. 

 Leaf-blades narrowly oblanceolate to linear or filiform. 



Calyx-lobes scarcely scarious-margined, entire; inflorescence few-flowered; floral 

 leaves like the rest. 

 Leaves green and glabrate. 



Corolla 20-25 mm. long, deeply 2-hpped, with relatively broad tube. 



76. P. Crandallii. 

 Coroila 15-20 mm. long, less deeply 2-llpped, with a narrow tube. 



77. P. xylus. 

 Leaves densely canescent-puberulent. 78. P. teucrioides. 



Calyx-teeth scarious-margined, dentate or erose; inflorescence many-flowered, racemi- 

 form; floral leaves reduced. 79. P. coloradensis. 



XVI. Glandulosi. 

 One species. 80. P. glandulosus. 



XVII. AZUREI. 



Leaves dentate, incLsed, or pinnatifid. 



CoroUa about 3 cm. long; flowers in a dense terminal panicle; anthers villous. 



81. P. vcniistus. 

 Corolla 1-3 cm. long; flowers in an open more or less leafy panicle with spreading 

 branches; anthers glabrous. 

 Leaves opposite. 



Leaves incised or pinnatifid. 82. P. Richardsonii. 



Leaves merely dentate or serrate. 



Leaves serrate; corolla 15-20 mm. long. 83. P. diffusus. 



Leaves sahently dentate; corolla 12-15 mm. long. 84. P. diphyllus. 

 Leaves in whorls of tliree. 85. P. triphyllus. 



Leaves entire. 



Calyx and inflorescence more or less glandular; leaves puberulent. 



86. P. Kingii. 

 Calyx and inflorescence glabrous or the latter somewhat puberulent but not glandular. 

 Calyx-lobes lanceolate, acute or acuminate. 



Stem-leaves lanceolate, oblong or oblanceolate to linear, glabrous. 



Plant low and decumbent at the base; lower stem-leaves oblanceolate, the 



upper oblong; calyx-lobes narrowly lanceolate. 87. P. Leonardi. 

 Plant tall; stem-leaves lanceolate or oblong-lanceolate; calyx-lobes ovate- 

 lanceolate, acuminate. 88. P. platyphyllus. 

 Stem-leaves Linear, puberulent. 89. P. Cusickii. 

 Calyx-lobes broadly ovate or obovate, mucronate, scarious-margined; leaves lin- 

 ear to lanceolate. 90. P. sepalulus. 



XVIII. PUNICEI. 



Stem and leaves puberulent; upper stem-leaves more or less acmninate. 



91. P. coccinalus. 

 Stem and leaves glabrous or nearly so; stem-leaves obtuse or acute. 



Stem-leaves ovate to lanceolate; corolla 2-3 cm. long. 92. P. Ealonii. 



Stem-leaves linear-lanceolate; coroUa 1.5-2 cm. long. 93. P. ulahertsis. 



XIX. Barbati. 

 Lower lip bearded within. 94. P. barbatus. 



Lower lip glabrous within. 



