134 Polygonaceae 
bescent above; peduncles 5—-15 cm. long, with a whorl of leaves 
in the middle. 
c. Umbel simple. E. 
E. douglasii Benth. 
cc. Umbel compound. E. 
E. douglasii ramosum Pip. 
YY. Lobes of the involucre erect. 
d. Plants shrubby thruout; leaves linear, margin revolute; flowers pink to 
purplish. E, E, thymoides Benth. 
dd. Plants shrubby only at much-branched base; leaves wider than linear, 
margin not revolute. 
e. Plants 5—7.5 cm. high; flowers yellow; bracts 3—8. C. (E. 
pyrolaefolium coryphaeum.) 
E. pyrolaefolium Hook. 
ee. Plants 12—25 cm. high; flowers purplish; bracts 2. E. (E. 
androsaceum for our region.) 
E. piperi Gr. 
XX. + Perianth glabrous. 
f. Peduncle naked except for a whorl of leaves where the rays of the umbel 
arise. 
g. Umbel compound; leaves mostly cordate. W.C. E. (E. composi- 
tum leianthum.) E. compositum Dousl. 
gg. Umbel simple; leaves narrowed at base. 
h. Umbel 4-rayed; middle ray short and naked except for involucre, 
other 3 also with linear bracts. U. 
E. ternatum How. 
hh. Umbel 3—10-rayed; rays naked except for involucre. 
i. Flowers distinctly yellow. E. (E. umbellatum hypoleium; E. 
umbellatum intectum.) 
E. umbellatum Torr. 
il. Flowers whitish-yellow. C. E. (EE. subalpinum; E. monta- 
num. ) E. umbellatum majus Benth. 
ff. Peduncle with a bract or a whorl of leaves other than those where the 
rays of the umbel arise. 
j. Only I involucre in the inflorescence; plant glabrous or nearly so except 
the involucre. 
k. Pedicels solitary. U. 
E. siskiyouensis Small 
kk. Pedicels several together in an umbel. E. 
E. tolmieanum Hook. 
jj. More than | involucre in the inflorescence; plant more or less tomen- 
tose. 
]. Peduncle with a single bract near the middle; leaves oblanceolate to 
oval. E. (E. stellatum bahiaeforme; E. croceum.) 
E. stellatum Benth. 
ll. Peduncle with a whorl of leaves near the middle; leaves narrowly 
oblanceolate. E. (EE. heracleoides angustifolium.) 
E. heracleoides Nutt. 
RUMEX DOCK 
Herbs (ours) or shrubs or trees, annual or biennial or perennial, juice more or less 
sour or acrid. Stem grooved, mostly branched, creeping to erect. Leaves alternate, 
