STANDLEY—ALLIONIACEAE OF THE UNITED STATES. 361 
Fruit dull olive with 10 conspicuous, paler, transverse 
lines. 
Stems rough-pubescent, more or less viscid, not 
villous___---~-~~_-_---- ee 2. H, aspera. 
Stems villous, not viscid_.~ ~~~ ~~ ee 2a. H. aspera 
villosa, 
Fruit not spherical, conspicuously longer than thick, 
Plants very large and stout; leaves 5 cm. long or 
less; blades short-petioled or almost sessile; stems 
stout, rough and glandular-pubescent; lobes of the 
involucre narrowly lanceolate___ ~_.-_--__________- 3. H. tenuiloba, 
Plants much smaller and stems much more slender; 
leaves not more than half the size of the above. 
Plants perfectly glabrous throughout, or some of 
the young leaves, perhaps, with a few scatter- 
ing hairs; leaves thin, ovate, acute; stems slen- 
der, the branches not spreading______________ 4. H. laevis. 
Plants not glabrous throughout, the pubescence 
sometimes scant but some always present on 
the stems. 
Stems villous, slender, with long inter- 
nodes; leaves rounded or obtuse at the 
a@pex_—_-_-_-_-_- ee Sb. H. glutinosa 
gracilis, 
Stems not villous. 
Leaves very small, mostly about 1 cm, 
long; stems = slender and much 
branched, woody at the base________- Ta. HH. californica 
microphylla. 
Leaves larger; stems less branched 
and with longer internodes. 
Flowers purplish red 
Fruit almost 8 mm, long, nar- 
row; leaves thin, obtuse, cor- 
date or rounded at the base; 
stems woody below; flowers 
few, conspicuously pediceled ; 
lobes of the involucre lanceo- 
od 
late, 7 mm. long ___________ 5. H. oligantha. 
Fruit about 4 mm. long. 
Flowers about 12 mm. long; 
fruit narrowed toward 
the base and apex, in- 
conspicuously striate, 
dark brown____________- T. H. californica, 
Flowers about 2 cm. long; 
fruit dark brown, not at 
all striate; stems finely 
pubescent especially 
above__________________- 6. H. polyphylla. 
66788—voL 12, pt S—O9——5 
