STANDLEY TREES AND SHRUBS OF MEXICO 1523 



Leaves simply (rarely somewhat doubly) serrate or serrulate, densely 

 whitish-tomentulose at least beneath. 

 Body of the fruiting involucre puberulous or pilose; leaf blades chiefly 



lanceolate or lance-ovate 12. F. deltoidea. 



Body of the fruiting involucre densely lanate-tomentose; leaf blades 



chiefly deltoid-ovate or ovate 13. F. chenopodiifolia. 



Leaves sinuate-lobed to tripinnatifid. 



Leaves green and sparsely strigillose to hispid beneath. 



Spines of the fruiting involucre L5 to 3.5 cm. long 1. F. bryantii. 



Spines of the fruiting involucre 1 to 3.5 mm. long. 

 Leaves bipinnatelj- lobed. 



Spines of the fruit 6 to 9, not hooked, very short 4. F. hispida. 



Spines of the fruit numerous, hooked, about 3 mm. long. 



6. F. magdalenae. 

 Leaves pinnatelj^ lobed or shaUowly pinnatifid. 



Leaves deeply lobed, with narrow divisions; fruit merely glandular. 



2. F. acuminata. 

 Leaves shaUowly lobed, with broad teeth or lobes; fruit densely pilose. 



10. F. sanctae-gertrudis. 

 Leaves whitish or cinereous-pubescent or tomentulose beneath, at least when 

 young. 

 Spines of the fruiting involucre few (about 4 to 16). 



Leaves bipinnatifid or tripinnatifid 3. F. camphorata. 



Leaves pinnately lobed or deeply sinuate-toothed. 



Leaf blades up to 15 cm. long, the lobes coarsely serrate . 



9. F. arborescens. 

 Leaf blades 3 to 5 cm. long, the lobes spinulose-toothed. 



11. F. flexuosa. 

 Spines of the fruiting involucre numerous. 



Leaves small, 3 cm. long or less, 1 to 3-pinnatisect, the tips of the primary 

 lobes rounded; spines of the fruiting involucre strongly flattened at 



base, not hooked 5. F. dumosa. 



Leaves usually 3 to 5 cm. long, the tips of the primar\^ lobes usually 

 acutish; spines subterete or somewhat grooved above at base, hooked. 



6. F. magdalenae. 



1. Franseria bryantii Curran, Proc. Calif. Acad. II. 1: 232. 188S. 

 Acanihambrosia hryantii Rydb. N. Ainer. Fl. 33: 22. 1922. 

 Baja California; type from Magdalena Bay. 



Shrub 30 to 90 cm. high, with white-barked branchlets; leaves 1 to 4 cm. long; 

 pistillate involucres solitary or paired, long-persistent, appearing axillary; spines 

 of the involucre wide-spreading, not hooked, in 1 or 2 series. 



2. Franseria acuminata T. S. Brandeg. Proc. Calif. Acad. II. 2: 171. 1S89. 

 Known only from the type locality, Purisima, Baja California. 



Shrubby, about 60 cm. high, the branches brown, essentially glabrous; leaves 

 3.5 to 7.5 cm. long, long-acuminate; fruiting involucre "5 mm. long," with very 

 short incurved spines. 



3. Franseria camphorata Greene, Bull. Calif. Acad. 1: 192. 1885. 

 Northern Baja California and Guadalupe Island; type from Guadalupe Island. 

 Sufrutescent, tomentulose on the younger parts, camphory-resinous; primary 



lobes of the leaves lanceolate or triangular in outline, laciniately toothed to 

 nearly bipinnatifid; fruiting involucres about 7 mm. long. 



3a. Franseria camphorata leptophylla A. Gray, Proc. Amer. Acad. 22: 309. 

 1887. 



