38 NORTH AMERICAN FLORA [Volume 3 



oblong, slightl}^ 3-toothed. Disk-flowers numerous; corolla-tube glandular, shorter than the 

 cylindro-campanulate throat; teeth 5, short. Achenes elongate, 4-angled, tapering downward. 

 Pappus of 10-16 squamellae which are narrowly lanceolate, with a distinct midrib extending 

 to or bejond the apex. 



Type species, Schkuhria integrifolia A. Gra3^ 



Stem subscapose; leaves mostly near the base; upper stem-leaves reduced. 1. P. integrifolia. 



Stem leafy throughout. 2. P. oblongifolia. 



1. Platyschkuhria integrifolia (A. Gray) Rydb. Bull. Torrey Club 



33:155. 1906. 



Schkuhria integrifolia A. Gray, Am. Nat. 8: 213. 1874. 

 Bahia nudicaulis A. Gray, Proc. Am. Acad. 19: 27. 1883. 

 Bahia deserlorum M. E. Jones, Zee 2: 249. 1891. 

 Platyschkuhria desertorujn Rydb. Bull. Torrey Club 37: 333. 1910. 



A perennial with a thick woody caudex; stem leafy mostly at the base, 1.5-3 dm. high, 

 canescent and more or less glandular, especially above; lower leaves petioled, crowded; blades 

 oval or ovate, triple-ribbed, entire, 2-8 cm. long, canescent-hirsutulous, thick; upper stem- 

 leaves much reduced, oblanceolate to linear; heads 1-9, corymbose; peduncles 3-7 cm. long; 

 involucre hemispheric, about 1 cm. high, 15-18 mm. broad; bracts lanceolate or oblanceo- 

 late, acute or abruptly acuminate, glandular-puberulent ; ligules 10-12, oblong, about 1 cm. 

 long; disk-flowers man}-; corolla about 6 mm. long; tube glandular, shorter than the cylindro- 

 campanulate throat; achenes oblong-obpyramidal, 4 mm. long, striate, hirsute throughout; 

 pappus-squameUae 12-15, lanceolate, 2 mm. long. 



Type locality: Wind River Mountains, Wyoming. 

 Distribution: Wyoming, Colorado, and Utah. 



2. Platyschkuhria oblongifolia (A. Gray) Rydb. Bull. Torrey Club 



33: 155. 1906. 



Schkuhria integrifolia oblongifolia A. Gray, Am. Nat. 8: 213. 1874. 

 Bahia oblongifolia A. Gray, Proc. Am. Acad. 19: 27. 1883. 



A low perennial with woody caudex; stem about 2 dm. high, canescent-puberulent, leafy; 



leaves alternate, petioled or the uppermost sessile; blades oblong or elliptic, thick, puberulent, 



triple-ribbed, 3-5 cm. long; heads mostly 3, corymbose; involucre hemispheric, 8-9 mm. 



high, about 1 cm. broad; bracts oblong or elliptic, obtuse, puberulent; ligules about 10, 



oblong, 1 cm. long; disk-flowers many; corollas about 5 mm. long; tube glandular, shorter 



than the throat; achenes elongate-obconic, 3 mm. long, less pubescent; squamellae 10-12, 



narrowly lanceolate, 3 mm. long. 



Type locality: Dry hills, Valley of San Juan, Utah or New Mexico. 

 Distribution: Colorado, New Mexico and Arizona. 



30. HULSEA T. & G.; A. Gray, in Torr. Pacif. R. R. Rep. 6: 76. 



1857. 



More or less fleshy villous or viscid perennials, biennials, or annuals. Leaves alternate, 

 sessile or with winged petioles. Heads rather large, solitary or paniculate. Involucre 

 hemispheric; bracts in 2 or 3 series, narrow, the outer somewhat shorter. Receptacle flat, 

 without paleae, alveolate-dentate, the teeth minute, horny. Ray-flowers ligulate, fertile, 

 pistillate; ligules elongate, yellow or purplish. Disk-flowers numerous, hermaphrodite, 

 fertile; corollas tubular; tube slender, glandular- viscid ; throat cylindric; limb 5-toothed. 

 Anthers not caudate. Style-branches of the hermaphrodite flowers obtuse, not appendaged. 

 Achenes all alike, linear-cuneate, subtetragonal, compressed, villous especially on the margins. 

 Pappus of 4 hyaline squamellae, which are broad, obtuse, erose or fimbriate, without nerves. 



Type species, Hulsea californica T. & G. 



Basal leaves spatulate or obovate to oblanceolate, woolly or floccose. 

 Stem tall, 3-10 dm. high, leafy; plant apparently biennial or annual. 



Ligules more than 1 cm. long; leaves in age glabrate and green. 1. H. californica. 



Ligules 5-8 mm. long; leaves permanently floccose. , 2. H. callicarpha. 



