STANDLEY TREES AND SHKUBS OF MEXICO 1491 



9. Aplopappus purpusii (T. S. Brandeg.) Blake. 



Ericameria purpusii T. S. Brandeg. Univ. Calif. Publ. Bot. 4: 191. 1911, 

 Known only from the type locality, Cerro de Macho, Coahuila. 

 Low branching shrub, finely hirtellous on the younger parts; larger leaves 

 linear-subulate, 5 to 7 mm. long, 0.6 mm. wide, stiff, spreading, mucronulate, 

 bearing fascicles in their axils, those of the branches appressed or erect, smaller, 

 decurrent, with thick midrib; heads solitary, terminating leafy branchlets, dis- 

 coid, 8 to 10-flowered, turbinate-hemispheric; involucre 5 mm. high, the phyllaries 

 ovate to oblong, acute; achenes silky. 



10. Aplopappus monactis A. Gray, Proc. Amer. Acad. 19: 1. 1883. 

 Ericameria monactis McClatchie, Erythea 2: 124. 1894. 

 Tumionella monactis Greene, Leaflets 1: 173. 1906. 



Northern Baja California. California and Nevada; type from borders of 

 Mohave Desert. 



Much-branched shrub 1 meter high or less, slightly pubescent, more or less 

 punctate, very leafy; leaves linear or linear-oblanceolate, 5 to 15 mm. long, 

 1.5 mm. wide or less, even the reduced leaves of the branches distinctly flattened 

 above; heads pediceled, cymose-panicled at tips of branches; involucre 4 mm. 

 high, the phyllaries very few, oblong or lance-oblong, obtuse or acute; rays to 2; 

 disk flowers 5 to 8; achenes silky. 



11. Aplopappus parishii (Greene) Blake. 



Bigelovia parishii Greene, Bull. Torrey Club 9: 62. 1882. 



Chrysoma parishii Greene, Erythea 3: 10. 1895. 



Ericameria parishii H. M. Hall, Univ. Calif. Publ. Bot 3: 55. 1907. 



San Pedro Martir, Baja California. California; type from Waterman Canyon, 

 San Bernardino Mountains. 



Shrub 2 to 5 meters high, very resinous, densely leafy; leaves linear-elliptic or 

 elliptic-lanceolate, 2 to 6 cm. long, 3 to 10 mm. wide, entire, acute, densely punc- 

 tate, sessile; heads numerous, discoid, about 10-flowered, forming terminal 

 flattish cymose panicles; involucre 5 mm. high, the phyllaries lanceolate or lance- 

 oblong, acute or obtusish; achenes minutely silky. 



12. Aplopappus pyramidatus (Robins. & Greenm.) Blake. 



Bigelovia pyramidata Robins. & Greenm. Proc. Amer. Acad. 32: 43. 1896. 



Known only from the type locality and vicinity, Oaxaca City, Oaxaca. 



Frutescent, 1 meter high or less; stem densely cinereous-tomentose, in age 

 glabrescent; leaves linear, 1 to 2.8 cm. long, 1.5 mm. wide or less, mucronulate, 

 revolute-margined, tomentose, glabrate above; heads discoid, 9-flowered, sub- 

 sessile, mostly solitary in the axils of leafy bracts 1 cm. long or less, forming long 

 spikelike panicles; involucre 5 mm. high, about 3-seriate, the phyllaries lanceolate 

 to linear-lanceolate, acute to acuminate, somewhat glandular and sparsely pilose, 

 without herbaceous tips; achenes silky. 



13. Aplopappus vernicosus T. S. Brandeg. Proc. Calif. Acad. IL 2: 168. 1889. 

 Known only from the type locality, ET Rosario, Baja California. 



Shrubby, intricately branched, essentially glabrous, resinous, about 45 cm. 

 high; leaves cuneate-obovate or rhombic-obovate, 6 to 9 mm. long, 3 to 4 mm. 

 wide, with 2 to 6 spinulose-tipped teeth, narrowed into a petioliform entire base, 

 coriaceous, not distinctly dotted, sometimes with fascicles in the axils; heads 

 1 to 3 at tips of short branchlets toward apex of stem and branches, leafy-bracted ; 

 involucre 5 mm. high, the phyllaries few, oblong or linear-oblong, obtuse, the outer 

 ciliate below, with conspicuous green tips, the inner with obscure tips; rays 5; 

 disk flowers 6; achenes silky. 



14. Aplopappus drummondii (Torr. & Gray) Blake. 

 Linosyris drummondii Torr. & Gray, Fl. N. Amer. 2: 233. 1842. 

 Bigelovia drummondii A. Gray, Proc. Amer. Acad. 8: 639. 1873. 



