CHICORY FAMILY 275 



Leaves, at least the lower ones, broad, oblanceolate in outline, and runcinate. 



3. P. ramosa. 

 Pappus merely scabrous or hirsutulous at the base. 



Leaves runcinate, but narrow; involucres 9-10 mm. liigh. 4. P. pauciflora. 

 Leaves linear-flliform; involucres 5-6 mm. high. 5. P. myrioclada. 



Annuals or biennials. 



Pappus-bristles not dilated at the base; heads usually subsessile on spike-like branches. 



6. P. virgata. 

 Pappus-bristles somewhat dilated at the base, often more or less united ; heads panicu- 

 late. 

 Pappus plumose to the base or nearly so; plant tall and slender. 7. P. paniculata 

 Pappus plumose only above the middle; plant usuaUy low and stout. 



8. P. exigua. 



4. NEMOSERIS Greene. Desert Chicory. 



Ligules 10-15 nun. long; beak of the achene.s m.uch shorter than the body. 



1. N. neomexicana. 

 Ligules about 5 mm. long; beak of the achenes as long as the body. 2. N. californica. 



5. TRAGOPOGON (Tourn.) L. Salsify, Oyster Plant. 



Flowers yellow. 



Bracts 8-9; flowers chrome yellow; involucral bracts equalling or shorter than the 



flowers. 1. T. pralensis. 



Bracts 10-13, rarely less; flowers lemon yellow; involucres longer than the flowers. 



2. T. duhius. 

 Flowers purple; involucral bracts much longer than the flowers. 3. T. porrifolius. 



6. HYPOCHAERIS L. Cat's-ear, Gosmore. l. H. radiala, 



7. ADOPOGON Neck. l. .4. virginicus. 



8. CICHORIUM (Tourn.) L. Chicory. l. C. invybus. 



9. UROPAPPUS Nutt. 



Awns 1-2 times as long as the short pappus-squamellae. 1. U. macrochaehis. 



Awns scarcely half as long as the long pappus-squamellae. 2. U. linearifoiius. 



10. NOTHOCALAIS (A. Gray) Greene. 

 Bracts linear-lanceolate, scarcely spotted. 



Pappus di-stinctly paleaceous, of narrow squamellae graduaUy attenuate. 



1. N. troximoides. 

 Pappus of bristles only sUghtly broader and flattened at the base. 2. N. cuspidata. 



Bracts ovate or ovate-lanceolate, acuminate, conspicuously spotted. 3. A^. nigrescens. 



11. CALYCOSERIS A. Gray. 



Flowers rose-colored; achenes with the short beak about 5 mm. long. 1. C. Wrighlii. 



Flowers yellow; achenes ^vith the long beak about 10 mm. long. 2. C. Parryi. 



12. YOtJNGIA Cass. 



.\chenes con.spicuously beaked; stem 1-2 dm. high. 1. Y. elegans. 



Achenes scarcely beaked, merely constricted below the disk; stem 5 cm. or less high. 



2. Y. nana. 



13. GLYPTOPLEURA D. C. Eat. 



Corollas wliite, turning pink; leaves with broad white scarious margins and short broad 

 teeth. 1. G. marginala. 



Corollas yellow, turning pink; leaves with very narrow white scarious margins and subu- 

 late, setiform teeth. 2. G. sctulosa. 



14. MALACOLEPIS (A. Gray) Heller. Snake's Head. i. M. Coulicri. 



15. MALACOTHRIX DC. Desert Dandelion. 



Divisions of the leaves filiform; plant scapose or nearly so. 1. i\f. glabrata. 



Divisions or lobes of the leaves not flhform; stem more or less leafy. 



Leaves sinuately runcinate; lobes entire or nearly so; achenes not winged. 



2. M. runcinata. 

 Leaves deeply pinnatifld; divisions toothed or lobed. 



Achenes wing-margined on 5 of the ribs; outer persistent bristles of the pappus 



present. 3. M. Torreyi. 



Achenes not winged ; outer persistent bristles of the pappus none. 



4. A/, sonchioides. 



16. PLEIACANTHUS (Nutt.) Rydb. l. P. spinosus. 



17. LYGODESMIA D. Don. Wild Asparagus, Skeleton Weed, Prairie 

 Pink. 



Perennials, with deep-seated rootstocks. 



Involucres 15-25 mm. high, 6-10-flowered. 1. L. grandiflora. 



