CARROT FAMILY 17! 



Umbels open; petaJs yellow; involucre present, although often a mere vestige. 



Divisions of the leaves narrow. 5. C. Fendleri. 



Divisions of the leaves broad. 6. C. Newberryi. 



30. PSEUDOCyMOPTERUS Coult. & Rose. 



Petals Ught yellow; bractlets linear-subulate, longer than the flowers. 

 Plant over 1 dm. high, with distinct leafy stems. 



Ultimate divisions of the leaves short, ovate or lanceolate: leaves ovate in outline. 



1. P. montanus. 

 Ultimate divisions of the leaves linear, elongate. 



Leaves, at least the basal ones, ovate in outline. . 2. P. sylvaticus. 



Leaves, at least the basal ones, broadly rhombic in outline. 



Plant slender; leaves mostly twice compound, with very long and few 



divisions. 3. P. tenuifolius. 



Plant low; leaves thrice pinnate with shorter, more numerous divisions. 



4. P. muUifidus. 

 Plant less than 1 dm. high, nearly acaulescent. 5. P. Tidestromii. 



Petals purple, or orange tinged with purple; bractlets linear-lanceolate or lanceolate, 

 shorter than the flowers. 

 Stem 2-3 dm. high; ultimate leaf-segments narrowly linear. 6. P. versicolor. 



Stem 0.5—1.5 dm. high, nearly leafless; iiltimate divisions of the leaves short, oblong 

 or lanceolate. 7. P. purpureus. 



31. PSEUDOPTERYXIA Rydb. 



Leaves with long petioles; scape 1-3 dm. high. 



Primary divisions of the leaves once or twice dissected, with narrowly linear divisions. 

 Ultimate divisions of the leaves 5-10 mm. long; fruit about 6 mm. long. 



1. P. longiloba. 

 Ultimate divisions of the leaves 3-5 mm. long; fruit about 4 mm. long. 



2. P. anisata. 

 Primary divisions broad, cuneate-flabellate, cleft or toothed, with short, ovate or 



lanceolate teeth. 3. P. aletifolia. 



Leaves on slrort petioles; divisions linear; scape less than 1 dm. high. 4. P. Hendersonii. 



32. COGSWELLIA Spreng. Cous, Biscoit Root, Whisk-broom Parsley. 

 Plants slender with thick rounded corms. 



Corolla white. 



Bracts not scarious. 



Fruit puberulent. 1. C. Gormani. 



Fruit glabrous. 



Divisions of the leaves oblong, very short, 5 mm. long or less; oil-tubes 



solitary in the intervals. , 2. C. Canbyi. 



Divisions of the leaves linear, 1-7 cm. long. 



Wings of the fruit more than half as broad as the body: oU-tubes none. 



3. C. Geyeri. 

 Wings of the fruit less than half as broad as the body; oil-tubes severaU 



4. C. farinosa. 

 Bracts scarious-margiued. (See C. orientalis, C. netadensis, &c.) 



Corolla yellow. 



Fruit linear in outline. 



Divisions of the leaves few, long and linear. 



Umbellets open; pedicels 4-8 mm. long. 5. C. ambigua. 



UmbeUets compact; fruit nearly sessile. 6. C. leptocarpa. 



Divisions of the leaves flliform. 7. C. bicolor. 



Fruit oval in outline; divisions of the leaves oblong. 



Caulescent; fruit glabrous; oU-tubes solitary in the intervals. 



8. C. circumdata. 

 Acaulescent or nearly so. 



Fruit puberulent; oil-tubes soUtary in the intervals. 9. C. Cous. 

 Fruit glabrous ; oU-tubes several in the intervals. 10. C. montana. 



Plant generally stouter from a thickened root or rootstock, rarely corm-Uke. 



Bractlets of the Involucels many, conspicuous, often broad, or united at the base. 

 Bractlets obovate or spatulate; whole plant glabrous; corolla yellow. 



Involucre present, consisting of a scarious sheath, sometuues produced into 



linear green lobes. 11. C. concinna. 



Involucre wanting. 10. C. montana. 



Bractlets lanceolate, oblong or linear. 

 Corolla white. 



Bractlets scarious-margined, as well as the whole plant puberulent or 

 rarely glabrate. 

 Fruit glabrous; oil-tubes soUtary in the intervals. 12. C. orientalis. 

 Fruit pubescent; oil-tubes several in the intervals. 13. C. nevadensis. 

 Bractlets not scarious-margined, villous. 14. C. macrocarpa. 



Corolla yellow or purple. 



Wings of the fruit half as wide as the body or broader. 



Bractlets more or less united, densely villous; corolla yellow. 



15. C. villosa. 

 Bractlets distinct, less densely villous; corolla often tlaged with purple. 



16. C. Jonesii. 



