252 CARDUACEAE 



Leaves of the stolons spatulate, usually rounded at the apex. 15-30 mm. 

 long, tomentum looser. 27. A. bractcosa. 



Inflorescence and upper leaves not glandular, the latter reduced: bracts 

 brownish. 28. A. oxyphylla. 



VI. Apric.\e. 

 Plant tall, 2-3 dm. high; heads usually peduncled. 



Leaves less than 2 cm. long and 5-S mm. wide, usually not triple-nerved; heads 7-9 



mm. high. 28. A. oxyphylla. 



Leaves over 2 cm. long, 7-10 mm wide, triple-nerved; heads about 1 cm. liigh. 



29. A. obovata. 

 Plant low, usually less than 1 dm. high; heads sub3e.5sile. 30. A. aprica. 



VII. C.\MPESTRES. 



Plant about 3 dm. liigh; basal leaves distinctly triple-nerved. 31. .4. Howellii 



Plant 1 dm. or less: ba.sal leaves not distinctly triple-nerved. 



Inflorescence not glandular; bracts of the pistillate heads lanceolate or linear-lanceo- 

 late, acute: those of the staminate heads oblong, obtiise. 32. A. campestris 

 Inflorescence more or less glandular-hairy; bracts in both heads ovate to lanceolate, 

 acute or acutish, in the staminate broader. 33. A. marginala. 



VIII. ROSUL.\T.\E. 

 Bracts with wliite upper portion; leaves wliite on both sides. 34. A. rosulala. 



Bracts with brown upper portion; leaves glabrate above. 35. A. Sierrae-Blancae. 



IX. Argente.\e. 

 Basal leaves oblanceolate. 36. A. oblancrolala. 



Basal leaves very narrowly linear-oblanceolate. 37. A. luzuloidcs. 



X. Pulcherrim.\e. 

 Bracts with a large dark spot, those of the pistillate heads ovate to lanceolate, acute, 

 those of the staminate heads ovate or oval, obtuse or acutish; pistillate heads 

 6-10 mm. high, turbinate at the base. 

 Plants 1-2 dm. liigh; ribs of the leaves not conspicuous; outer bracts wholly fuscous. 



38. .4. lanata. 

 Plants 3-5 dm. liigh; leaves with conspictxous ribs; tips of the bracts brownish or 

 white. 39. -4. pulcherrima. 



Bracts with small dark spots or none; bracts of both staminate and pistillate heads with 

 oblong or oval, obtuse tips, those of the staminate heads slightly broader. 



40. ,4. anaphaloides. 



XI. DmoRPH.VE. 

 Plant without filiform stolons. 



Fruiting heads not over 1.5 cm. liigh; leaves oblanceolate: stem 1-3 cm. high. 



41. .4. dimnrpha. 

 Fruiting heads about 2 cm. high; leaves spatulate, loosely tomentose; stem 3-5 cm. 



high. 42. A. macrncephala. 



Plants with filiform ascending stolons. 43. .4. flagellaris. 



56. ANAPHALIS DC. Pe.\rly Everl.\sting. 



Leaves narrowly linear, 1 -nerved; heads about 5 mm. liigh. 1. .4. anguslifolia. 



Leaves linear-lanceolate to oblong-lanceolate, 3-nerved; heads 6-7 mm. high. 



Leaves comparatively tliin, less tomentose above. 2. .4. subalpina. 



Leaves comparativelv thick, almost equally wliite-tomentose on both sides. 



3. A. lanata. 



57. GNAPHALIUM L. Cudweed, Everl.\sting. 

 Bristles of the pappus not united at the base, falling off separately. 



Heads not leafy-bracted ; involucral bracts well imbricate, scarious, wliite or tinged 

 with brownish, rose, or vellow; plants mostly tall. 

 Leaves tomentose on both sides; plants little if at all glandular; involucres tomen- 

 tose at the base. 

 Stem-leaves narrowed at the base, neither decurrent nor clasjiing . 



Perennial or biennial; stem 3-5 dm. high; inflorescence open; bracts white 



1. G. Wrightii. 

 Annual; stem 1-2 dm. liigh; inflorescence dense; bracts yellowish. 



2. G. thermale. 

 Stem-leaves not narrowed at the base, more or less decurrent, or at least 



auricled-clasping . 

 Leaves with short Ijroad adnate auricles at the base; bracts obtuse. 



Heads 5-6 mm. high, numerous, in glomerulos t>ii(ling the short spread- 

 ing branches: bracts slightly if at all >(llc)\vish; plant tall; stem- 

 leaves lanceolate or oblong, with rounded l)ases, cuspidate. 



3. G. prniiin\im. 

 Heads 4 mm. high, few, in small glomerules, ending the stem or few 



erect branches; bracts decidedly yellowish when young: plant low; 

 leaves oblong to linear, merely acute or obtuse. 

 Stem erect, strict; lower stem-leaves oblong-oblanceolate. 



4. G. sulphnrcscens. 

 Stem decumbent at the base; lower stem-leaves spatulate. 



5. G. latjopodioides. 

 Leaves distinctlj' decurrent: bracts acutish; heads 4-5 mm. high. 



Bracts broadly ovate; inflorescence corymbiform. 6. G. WiUiamsii. 



