POLYGONACEAE. 109 



9. E. wrightii Torr. Much branched, leafy at base, 2-5 dm. 

 high, rather slender; leaves oblong-ovate, 15-25 mm. long, acute, 

 narrowed at base to a 4-8 mm. long petiole; bracts all small, tri- 

 angular; involucres loosely spicate along the ascending branches, 

 3 mm. high, the teeth rigid, acute; perianth rose color, 3 mm. long; 

 achene scabrous on the angles above, these acute at base. 



Frequent in the San Gabriel Mountains in the pine belt. 



10. E. elongatum Benth. Stems erect, rather slender, from a 

 sparingly branched base; leaves usually somewhat scattered, oblong- 

 lanceolate, 2-3 cm. long, acute, narrowed to a short petiole, be- 

 coming glabrate above; bracts ovate-triangular to lanceolate, acute; 

 involucres distant on the few elongated branches, 5-6 mm. high, 

 obtusely toothed; flowers white or pale rose color, 2-3 mm. long; 

 achene glabrous. 



Common in the chaparral belt of all the mountains, 



11. E. gracile Benth. Floccose-tomentose throughout, rather 

 diffusely branched, 2-6 dm. high; leaves oblanceolate or broadly 

 oblong, tomentose on both sides or less so above; bracts more or 

 less elongated, the lower foliaceous; involucres rigid, acute, often 

 dark brown; perianth white or pale rose color, 1.5 mm. long. 



Common in sandy soil, especially toward the coast. 



11a. E. gracile leucocladon (Benth.) Torr. Less branched, the 

 branches strict, becoming glabrate; flowers pale rose color. 

 Dry sand-washes of the interior. 



12. E. virgatum Benth. Slender, 3-6 dm. high, tomentose 

 throughout, branches few, ascending, elongated, strictly virgate or 

 fiexuous; bracts lanceolate, shorter than the involucres, sometimes 

 including 1 or more leaves; involucres tomentose, narrow, 4 mm. 

 long; perianth 2 mm. long, white or yellowish, glabrous. 



Common in the Mt. Pinos region, but not definitely known in 

 the San Gabriel Mountains. 



13. E. molestum Wats. Stems usually solitary, 3-7 dm. high, 

 sparsely branching usually 1 dm. or more above the base, glabrous 

 and glaucous; leaves all basal, rounded or cordate, 1-2 cm. wide, 

 white-woolly on both surfaces, the margins undulate or crisped; 

 bractlets apparently never foliaceous; involucres cylindric, about 

 5 mm. long, glabrous without, the teeth short; perianth white, tinged 

 with rose. 



A common species in the foothills of the San Bernardino Moun- 

 tains. 



14. E. davidsoni Greene. Closely related to the preceding species, 

 from which it is best distinguished by its more slender habit and 

 smaller involucres, 3 mm. long. 



A common species in the San Gabriel Mountains, especially in 

 the coniferous forests. First collected on Mt. Wilson by Dr. David- 

 son. 



15. E. stellatum Benth. Perennial with a spreading woody 

 base; leaves ovate to oblanceolate, white-tomentose beneath, 

 glabrate above; peduncles 1-3 dm. high, loosely tomentose; in- 



