1490 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM 



Low shrub, about 0.5 meter high, nearly glabrous, densely glandular-punctate; 

 leaves very narrowly linear or linear-filiform, 1 to 3.5 cm. long, 1.2 mm. wide or 

 less, those of the axillar}^ fascicles reduced and often subterete; heads numerous, 

 in an elongate panicle or racemosely arranged, usuallj' pedicellate; involucre 6 to 

 7 mm. high, strongly graduate, narrowly turbinate; raj-s several, short; achenes 

 silky. 



5. Aplopappus sonoriensis (A. Gray) Blake. 



Ericameria diffusa Benth. Bot. Voy. Sulph. 23. 1844. Not Aplopappus 

 diffusus DC. 1836. 



Solidago diffusa A. Gray, Proc. Amer. Acad. 5: 159. 1861. 



Linosyris sonoriensis A. Gray, Proc. Amer. Acad. 8: 291. 1870. 



Bigelovia diffusa A. Gray, Proc. Amer. Acad. 8: 640. 1873. 



Baja California and islands, Sinaloa, and Sonora; type from Yaqui River, 

 Sonora. 



Frutescent, 60 cm. high or less, glabrous, punctate, much branched, verj- leafy; 

 leaves linear-filiform, 3.5 cm. long or less, 1 mm. wide or less, subterete, or the 

 larger sometimes flattish above, those of the branches much reduced; heads 

 numerous, mostly subsessile, cymose-clustered, usually forming broad panicles; 

 involucre 3 to 4 mm. high, few-seriate, the oblong or lance-oblong phyllaries 

 with short greenish tips; rays to 2, small; disk flowers 4 or 5; achenes silkj-. 

 "Hierba del pasmo" (Sonora, Baja California). 



6. Aplopappus propinquus Blake, nom. nov. 

 Bigelovia hrachylepis A. Gray, Bot. Calif. 1: 614. 1876. 

 Chrysoma hrachylepis Greene, Erythea 3: 12. 1895. 



Ericameria hrachylepis H. M. Hall, Univ. Calif. Publ. Bot. 3: 56. 1907. 



Haplopappus hrachylepis H. M. Hall, Univ. Calif. Publ. Bot. 7: 273. 1919. 

 Not H. hrachylepis Phil. 1894. 



Northern Baja California. California; type from Larken's Station, northeast 

 of San Diego. 



Shrub 2 meters high or less, much branched, densely glandular-punctate; 

 leaves linear-filiform, 1 to 2.5 cm. long, 1.3 mm. wide or less, often with fascicles 

 in their axils, the larger sometimes flattish above; heads narrowly panicled or 

 subracemose, pedicellate, discoid, 8 to 12-flowered; involucre 4 to 6 mm. high, 

 few-seriate, the phyllaries lanceolate or linear-lanceolate, with linear central 

 gland; achenes silky-pilose. 



7. Aplopappus laricifolius A. Gray, PI. Wright. 2: SO. 1853. 

 Chrysoma laricifolia Greene, Erythea 3:11. 1895. 

 Bigelovia nelsonii Fernald, Proc. .Amer. Acad. 36: 505. 1901. 

 Ericameria nelsonii Blake, Contr. Gray Herb. n. ser. 52: 26. 1917. 

 Chihuahua. Arizona to Texas; type from Guadalupe Pass, New^ Mexico. 

 Much-branched shrub about 30 cm. high, densely glandular-punctate, densely 



leafy; leaves linear or narrowly linear-spatulate, 1 to 1.5 cm. long, 2 mm. wide or 

 leS'S, thick, flat; heads turbinate, becoming subhemispheric, solitary at tips of 

 short leafy branches, these usually cymose-clustered at apex of stem and branches; 

 involucre about 5 mm. high, little graduate, the phyllaries linear-lanceolate, 

 acuminate, with a linear dorsal gland; rays 7 or less, exceeding disk; achenes 

 silky. 



8. Aplopappus parrasanus Blake. 



Ericameria parrasana Blake, Contr. Gray Herb. n. ser. 52: 26. 1917. 



Known onlj' from the type locality, Sierra de Parras, Coahuila. 



Branching shrub, densely glandular-punctate, very leafy; leaves linear, 6 to 

 9 mm. long, 0.6 to 0.9 mm. wide, flattish above, not fascicled; heads hemispheric, 

 solitary, terminating short leafy branches; involucre 4 mm. high, slightly graduate, 

 the phyllaries narrowly oblong or oblong-lanceolate, acute, with lanceolate ap- 

 pressed subherbaceous tips; rays about 10, oval, 5 mm. long; achenes silky. 



