STANDLEY TREES AND SHEUBS OF MEXICO 1587 



Rays pistillate, fertile. 



Leaves lanceolate to oval, unlobed or ternatisect. 



Heads numerous, cymose-panicled; leaves lanceolate to oblong-ovate 

 unlobed or ternatisect 1. C. mutica! 



Heads solitary or few; leaves cuneately oblanceolate to oval, unlobed. 

 Leaves 2 to 5 cm. long, cuneately oblanceolate or obovate. 



2. C. cuneifolia. 



Leaves 1 to 2 cm. long, oval 3. c. parvifolia. 



Leaves or their lobes linear-filiform or very narrowly linear. 

 Leaves entire, or rarely with a pair of lobes, 2 to 6 cm. long. 



4. C. cyclocarpa. 



Leaves all, except sometimes the uppermost, pinnately 3 to 7-Iobed. 



Heads larger; involucre 6 to 8 mm. high; leaves mostly with 3 pairs of 



lobes 5. c pinnatisecta. 



Heads smaller; involucre 4 to 5 mm. high; leaves mostly with 1 pair of 



lobes 6. C. insularis. 



Rays neutral. 



Pappus none; achenes glabrous 7. C. cordylocarpa. 



Pappus awns 2, antrorse-ciliate; achenes cihate. 



Leaves rhombic, merely serrate or doubly serrate 8. C. petrophiloides. 



Leaves once or twice pinnatisect. 



Heads smaller; inner phyllaries about 5 mm. long; rays 4 to 8 mm. long. 



9. C. petrophila. 

 Heads larger; inner phyllaries 6 to 9 mm. long; rays 1 to 2 cm. long. 

 Outer phyllaries narrowly linear; ultimate lobes of the leaves 1 to 2.5 



mm. wide 10. C. rhyacophila. 



Outer phyllaries linear-oblong; ultimate lobes of the leaves 0.6 to 0.8 

 mm. wide 11, C. pringlei. 



1. Coreopsis mutica DC. Prodr. 5: 571. 1836. 

 Electra mexicana DC. Prodr. 5: 630. 1836. 

 Eleclra galeottii A. Gray, PI. Wright. 1: 110. 1852. 



Coreopsis galeottii Hemsl. Biol. Centr. Amer. Bot. 2: 195. 1881. 



Coreopsis mexicana Hemsl. Biol. Centr. Amer. Bot. 2: 196. 1881. 



Guanajuanto to Chiapas; type from Tlapuajahua. Guatemala. 



Shrubby, nearly or quite glabrous throughout, 2 meters high or less; leaf blades 

 lanceolate to oblong-ovate, 4 to 13.5 cm. long, serrate, often ternatisect, coria- 

 ceous or papery, petiolate; heads 2 to 4.5 cm. wide; achenes glabrous, epappose, 

 or the inner rarely with a pair of smooth slender awns. 

 la. Coreopsis mutica subvillosa DC. Prodr. 5: 571. 1836. 



Coreopsis mexicana hyperdasya Blake, Proc. Amer. Acad. 49: 338. 1913. 



Hidalgo and Oaxaca; type from Mexico, without definite locality. 



Stem, infloresence, and lower leaf surface densely tomentose. 

 lb. Coreopsis mutica holotricha Blake, Contr. Gray Herb. n. ser. 52: 55. 

 1917. 



Coreopsis mexicana hyperdasya holotricha Blake, Proc. Amer. Acad. 49: 338. 

 1913. 



Known only from the type locality, near San Luis Tultitlanapa, Puebla. 



Leaves small, densely and rather harshly cinereous-puberulous on both sides. 



2. Coreopsis cuneifolia Greenm. Proc. Amer. Acad. 40: 43. 1904. 

 Durango and Jalisco; type from State of Durango. 



Fruticose or suffruticose, about 60 cm. high, erect-branched, somewhat pubes- 

 cent, glabrate; leaf blades toothed above the middle, subsessile; heads few, 

 long-peduncled, 2 cm. wide; achenes epappose. 



