FLOWERING PLANTS AND FERNS OF ARIZONA 719 



21. Corolla usually 15 mm. long or longer; stamens not de- 

 clined (22). 

 22. Color of the corolla normally red or pink, the lobes acute or 

 acuminate (23). 

 23. Tube and throat of the corolla 18 to 40 mm. long, the lobes 

 caudate-acuminate; stamens exserted. 



21. G. AGGREGATA. 



23. Tube and throat of the corolla 10 to 15 mm. long, the 



lobes acute or short-acuminate; stamens included. 



22. G. ARIZOXICA. 

 22. Color of the corolla blue, violet, or deep purple, the lobes 

 rounded, more or less emarginate and apiculate (24). 



24. Corolla 15 to 20 mm. long; style glabrous; stamens not 



or only moderately exserted 23. G. macombii. 



24. Corolla 30 to 35 mm. long: style pubescent: stamens 



exserted 24. G. thurberi. 



10. Plants annual (25). 



25. Inflorescence normally capitate or subcapitate: stems leafy (26). 



26. Flower clusters subtended by leafy bracts; corolla not more 



than 10 mm. long, the limb white or whitish: stems usually 



decumbent or spreading, not more than 30 cm. long: 



Section Elaphocera (27). 



27. Corolla regular or nearly so, 4 to 5 mm. long: stamens not 



exserted: style glabrous: leaves all or nearly all pin- 



natifid or dentate 25. G. polycladox. 



27. Corolla slightly bilabiate, 6 to 10 mm. long: stamens 

 exserted, somewhat declined; style sparsely puberulent, 

 at least below (28) . 

 28. Leaf blades, at least the basal ones, pinnatifid or dentate. 



26. G. PUMILA. 



28. Leaf blades all entire 27. G. guxxisoxi. 



26. Flower clusters naked; corolla limb normally blue or violet 



(29). 



29. Corolla narrowly funnelform, deep blue, not more than 7 



mm. long; herbage viscid: leaves pinnatifid; ovules and 



seeds normally 1 in each cell: clusters few-flowered, 



loosely subcapitate to thyreoid, sometimes even more 



open, short-stalked or nearly sessile. 6. G. gilioides. 



29. Corolla broadly funnelform, pale violet or lavender. 7 to 



10 mm. long; herbage not viscid; leaves bipinnatifid; 



ovules and seeds several in each cell (30). 



30. Inflorescence densely capitate, many-flowered; peduncles 



very long: calyx lanate 28. G. achilleaefoli\. 



30. Inflorescence loosely subcapitate, few-flowered; peduncles 

 long or short : calyx not lanate 29. G. multicaulis. 

 25. Inflorescence open, paniculate or corymbiform (31). 



31. Seeds not changing in water: root leaves coarsely dentate or 



serrate or, at most, shallowly pinnatifid: inflorescence an 



open, rather few-flowered panicle (32). 



32. Root leaves oblong-ovate to nearly orbicular, 15 to 50 mm. 



wide, irregularly and coarsely serrate or incised with 



long-cuspidate teeth: corolla 8 to 10 mm. long, the limb 



4 to 5 mm. in diameter 30. G. latifolia. 



32. Root leaves oblong-linear, 3 to 15 mm. wide, rather regu- 



larly pinnately cleft: corolla 4 to 6 mm. long, the limb 

 2 to 3 mm. in diameter: stem leaves reduced, bractlike. 



31. G. LEPTOMERIA. 



31. Seeds mucilaginous in water; leaf blades, at least the basal 

 ones, pinnatifid or bipinnatifid; inflorescence paniculate or 

 corymbiform, the flowers numerous (33). 



33. Corolla 30 to 50 mm. long, pale blue or nearly white: 



mature capsules 1}* to 2 times as long as the calyx: 

 flowers long-pediceled, in very open, corymbiform pani- 

 cles; leaves pinnately parted, with few, long, narrowly 

 linear or filiform divisions 32. G. loxgiflora. 



286744' 4L' —46 



