Rydberg : Rocky Mountain flora 133 



Carduus floccosus sp. nov. 



Stout, about i m. high ; stem angled, loosely floccose ; leaves 

 oblanceolate in outline, about 2 dm. long, loosely floccose on both 

 sides, divided two-thirds to the midrib ; lobes 2 -cleft, each division 

 lanceolate, 1.5-2 cm. long, tipped with a spine about 5 mm. long ; 

 heads about 3 cm. high, 1.5-2.5 cm. wide ; bracts slightly floccose 

 on the margin and with a very narrow glandular dorsal line ; the 

 outer lanceolate, the inner linear-lanceolate, all with a short and 

 weak spine ; corolla red-purple. 



This species belongs to the C. undulatus group and has been 

 mistaken for that species. It has almost the same kind of leaves, 

 although more loosely floccose ; but the heads are very different, 

 resembling more those of C. Flodmanii and C. altissimus, the 

 bracts having a very slender glandular dorsal line. 



Colorado: Wolcott, 1902, Osterhout 2652. 



Carduus Tracyi sp. nov. 



Simple below ; stem 3-7 dm. high, striate and loosely floc- 

 cose ; leaves oblanceolate in outline, divided to near the base, 

 green but slightly floccose above, more or less tomentose be- 

 neath ; lobes oblong to linear-lanceolate, tipped with yellow spines 

 5-8 mm. long; heads 3-3.5 cm. high and about 3 cm. or less 

 wide ; bracts slightly floccose when young, yellowish with a very 

 broad and dark glandular spot on the back, the outermost and 

 inner narrowly lanceolate, the middle ovate-lanceolate, all with a 

 short spreading spine ; corolla ochroleucous. 



This is nearest related to C. Nelsonii Pammel, but is less to- 

 mentose, has smaller heads, more acute leaf-segments, and broader 

 bracts with shorter, more slender and spreading spines. It grows 

 in dry fields at an altitude of about 2100 m. 



Colorado: Mancos, 1898, Baker, Earlc & Tracy go (type); 

 Green Mountain Falls, 1895, E. A. Bessey. 



Gaertneria linearis sp. nov. 



Perennial, shrubby at base ; stems about 2 dm. high, sparingly 

 hirsute, branched ; leaves once or twice pinnate, 3-4 cm. long, 

 strigose above, minutely tomentulose beneath ; lobes linear, ob- 

 tuse, 3-5 mm. long ; staminate racemes about 3 cm. long ; heads 

 nodding, 3-4 mm. wide ; involucre strigose, cleft scarcely half- 

 ways into rounded-ovate lobes ; pistillate involucre with few 

 slender spines. 



