359 



er, crenate or sinuate-crenate, abruptly narrow-lanceolate, 3 cm long, 1-2 wide, 

 acute at apex, truncate or subcordate at closely sessile, entire or rarely minutely 

 base, g or y'ish-g on both surfaces; male * remotely denticulate, clothed equally 

 aments 25-35 mm long; sta 60 or more, on both sides with an appressed silky 

 anth dark r; pistillate aments 5 cm long, pubescence; stipules o or very minute on 

 loosely fld; ova glabrous; cap on pedi- vigorous shoots; aments surpassed by 

 eels 4 mm long, minutely rough-tuber- theirlfy peduncles, 3-5 cm long 1-2 cm 

 culate. SBer! SD! thick, often in pairs or in 3*5 at ends of 



The common cotton wood of So Cal; branches: scales oblong, obtuse in starn 

 Variety WISL1ZENI Sereno Wataon. aments, narrower & more acute in pist, 



Lvs sharply acuminate, truncate or glabrous on back> crisp hairy on marg i n 

 slight-cuneate at base; stam aments with 4 toward base> erose above; Jower half 

 shorter pedicels & less dilated thin discs, of fil densely crisp hairy; cap i ance olate, 

 pist aments very slender, 2-6 i long; disc covered with straight appressed silky 

 2 or 3 H broad; cap ovate to ovate-oblg, hairs> closely j^^. st}g sessile> oblong 

 omewhat angled, 3- or 4-valved, 4 or 5 A abou t twice as long as thick; mature 

 li long, on slender pedicels 2-8 li long. cap often bec ormng nearly glabrous. 



Baja! Crnz, LA, SD, SBer O. Abra, FI LA 102. 



POPULUS TRICHOCARPA T. * O. SALIX EX IGUA Nnttall, 



Tree with a broad hd of ascending Sm shrub of becomi a gm t ^ 

 branches, 8-15 m h.; Ivs ovate or oblong- branches H ht b lys cm , ^ 



ovate, rounded at base, acute at apex, wM ^ dosel sessil entire QJ . 

 serrulate, dark g* shining above, pale nearly so> canescent when young( com 

 beneath, 5-8 cm long, on terete petioles, becdVning xu ; te dabrous at manirit 

 3-5 cm long; male aments 3-5 cm long; very narruuly elliptic> veins yery indis . 

 ^^^r^J^l tinct ; sti P nleso; _ ^ cm long, on 

 loosrlv fld; ova hoary tomer.tose; cap 3- Fd about as lon^ nppearing with lv. 



, j lather densely & even -nd, sometimes trie 



Black cottonwood; Cruz. Ha U TO. Da lower fls remote; scalts of st.-m ament 



16. Rosa, oblong to obovate, in pist narrower and 



Genu SAI.IX Tournefort. L>i ger, sin* oth or more or Jess crisp 



Trees, shrubs and undershrubs, with villous on margins; cap closely sessile, 

 com long narrow acute Ivs & persistent lanceolate, glabrous, light g; stig ssort * 

 or early decid broad or minute stipules: thick, sessile, sometimes even appearing 

 stam aments dense, erect, spreading or slightly sunken in apex of cap. 

 drooping, their fls with i-n sta with fil Abrams, FI tA 102. -Interior vafleyB. 

 distinct or united below: pist com err ct Variety VIBEN8 Rowleo. 

 or spreading; ova sessile or short-siipi- Leaves 10-12 cm long, I wide, nearty 

 tate; sty short or filiform, with 2 entire glabrous, veins very conspicuous on both 

 or 2-cleft stig: cap i-celled, 2-vlved; sd sides > distinctly denticulate; stipules 

 num, minute. Willow. lar & e > oblong denticulate; aments lar^e, 



SALIX ARGOPHTLLA NuttalT- pint 4 cm long, i thick, sometimes in 3'* 



Tree or large shrub forming clumps, at ends of the long Ify shoots, 

 young twigs puberulent, branches nearly Abrains, FI LA.-HBer (Wright), 

 glabrous & very tough; bark turning from SALIX LAEVIGATA Bebb. 

 brown to y or orange before fl'ng: Ivs Tree 10-15 m hi; branches r'ish-br; 



