STANDLEY TREES AND SHRUBS OF MEXICO ' 1525 



11. Franseria flexuosa A. Gray, Proc. Amer. Acad. 20: 298. 1885. 

 Northern Baja California; type from Cantillas Canyon. 



Low shrub; leaves short-petioled, deltoid-lanceolate, coriaceous, sinuate-lobed 

 or -toothed, acuminate, canescent-puberulent on both sides; fruit 7 mm. long, 

 glandular and villous, the spines not hooked. (Description compiled.) 



12. Franseria deltoidea Torr. PI. Fr^m. 15. 1853. 

 Gaertnera deltoidea Kuntze, Rev. Gen. PI. 1: 339. 1891. 

 Sonora. Arizona; type from the Gila River. 



Low, shrubby, canescent-tomentulose; leaf blades 1 to 3.8 cm. long, slender- 

 petioled, cuneate at base, venose beneath; fruiting involucre about 7 mm. long, 

 its spines straight, flattened at base. 



13. Franseria chenopodiifolia Benth. Bot. Voy. Sulph. 26. 1844. 

 Gaertnera chenopodiifolia Abrams, Bull. N. Y. Bot. Gard. 6: 461. 1910. 

 Franseria lancifolia Rydb. N. Amer. Fl. 33: 36. 1922. 



Baja California and Cedros Island; type from Magdalena Bay. Southern 

 California. 



Suffrutescent, low, the branches cinereous-tomentulose, glabrate; leaf blades 

 2 to 3 cm. long, usually about as wide; spines of the fruiting involucre hook-tipped, 

 usually strongly flattened at base. 



Franseria lancifolia Rydb. is a form of this species with less pubescent fruits. 



14. Franseria ambrosioides Cav. Icon. PI. 2: 79. pi. WO. 1793. 

 Xanthidium ambrosioides Delpino, "Studi Lign. Anem. 63. 1871." 

 Gaertnera amhrosiodes Kuntze, Rev. Gen. PI. 1: 339. 1891. 



Sonora, Sinaloa, Durango, and Baja California; type from Mexico, without 

 definite locality. Arizona. 



Suffrutescent, hirsute and glandular, about 1.5 meters high; leaf blades 8 to 

 18 cm. long, 1 to 4.5 cm. wide, acuminate, coarsely serrate-dentate, slender- 

 petioled; fruiting involucre 1 to 1.2 cm. long, Xanthium-li^Q. "Chicura" (Sina- 

 loa, Baja California.) 



15. Franseria ilicifolia A. Gray, Proc. Amer. Acad. 11: 77. 1876. 

 Gaertnera ilicifolia Kuntze, Rev. Gen. PL 1: 339. 1891. 



Northern Baja Calif oriaia and islands; type from Cantillas Canyon. California 

 and Arizona. 



Shrubby, 30 to 60 cm. high, spreading-hirsute, densely leafy; leaves ovate or 

 rhombic-ovate, 3 to 10 cm. long, 1.8 to 9.5 cm. wide, sessile, cordate-clasping, 

 coriaceous; fruiting involucre 1.5 to 2.3 cm. long, densely covered with hooked 

 spines, glandular-hairy. 

 45. PHILACTIS Schrad. "Ind. Sem. Hort. Goett. 1831;" Linnaea 8: Litt.-Ber. 



24. 1833. 

 1. Philactis zinnioides Schrad. "Ind. Sem. Hort. Goett. 1831;" Linnaea 8: 

 Litt.-Ber. 24. 1833. 

 Mexico, without definite locality. 



Suflfruticulose, dichotomous, the young branches villous; leaves opposite, 

 petioled, broadly ovate, acuminate, serrulate, appressed-villous; peduncles in 

 the forks, monocephalous, shorter than the leaves; involucre 2-seriate, appressed; 

 receptacle elongate-conic; heads yellow; rays fertile, sessile, persistent, their 

 achenes trigonous, glabrous, with an awn on the inner angle; disk flowers sterile, 

 the achenes subtetragonous, with a pappus of 4 basally connate awns. (Descrip- 

 tion compiled.) 



46. ZINNIA L. Syst. Nat. ed. 10. 1221. 1759. 

 Reference: Robinson & Greenman, A revision of the genus Zinnia, Proc. 

 Amer. Acad. 32: 14-20. 1896 



