256 RANUNCULACEAE 
flower, with 3 sepals which fall as the flower expands. Petals none. 
Stamens numerous, carpels several, forming a rounded bunch. 
H. canadensis, L. ORANGE Root. GOLDEN SeAL. Basal leaf on stalk 
separate from flower-bearing stem, 5 to 9 in. broad, heart-shaped at 
base, at periphery cut by 3 to 5 deep sinuses, the various segments with 
notched borders. Flowering stem with two smaller leaves similarly cut. 
Flower greenish-white, the whole plant covered with soft hairs. Woods, 
most of our area. April. 
8. MYOSURUS, L. 
A small plant found in moist places, its carpels arranged about a 
spindle-shaped receptacle. Sepals 5 (sometimes none), petals yellowish. 
Pistils many; stamens 5 to 25. Leaves linear. 
M. minimus, L. (Fig. 6, pl. 46.) Mouse Tarr. : Plant 2 to 5 in. 
high, the elongated seed receptacle occupying nearly or quite 3 the 
length. Doubtful if found in our area, but has been reported in extreme 
southern part. 
B. Flowers with two envelopes, calyx and corolla 
9. RANUNCULUS, L 
Herbs, most of which have the leaves much divided (Figs. 7 and 8, 
page 396). Flowers solitary or in loose clusters. Sepals 5, or rarely less, 
falling off as the seeds develop. Petals 5 or more or less, sometimes 
minute, flattened, with a small pit and a scale at the base (the former 
to contain nectar). Seed carpels numerous in a rounded or elongated 
group, smooth. Stem leaves alternate, the foot-stalks broad and clasp- 
ing. Flowers all yellow, in our region. 
Aquatic, with dissected leaves . - . «. R. delphinifolius 
Terrestrial (Nos. 2 and 3 in ditches and muddy places). 
Fruit in cylindric heads. 
Plant nearly or quite destitute of hairs . . . . . R. sceleratus 
Plant Maver y MIAN eee ss | fase sles ious oes Memes ba ea ’R. pennsylvanicus 
Fruit in globose heads. 
Plants creeping . . . . RR. reptans and R. repens 
Plants not creeping; erect. or spreading. 
Leaves’ grass-like - « « WR lasstcauks 
Leaves undivided, egg- -shaped or ‘lance- shaped | a0 - R. pusillus 
Lower leaves broadly rounded and _ heart-shaped, upper deeply 
divided = si eaNlas R. micranthus 
Summit of fruit armed with a hooked style R. alleghaniensis 
Lower leaves egg-shaped but somewhat deeply lobed, upper leaves 
divided. <\.. ojo ue, ek Mel Gey ei Wie! Jali lie’ Ge CaO OR saeaS 
Lower leaves elliptic. eS R. arvensis 
Leaves divided into 3 parts by ‘deep sinuses, the leaflets not on 
elongated foot-stalks. 
Lobes without deep secondary sinuses . . . . R. recurvatus 
Lobes cut by deep secondary sinuses. 
Plant usually 2 to 3 ft. high . . . . .. |] K. acris 
Plant usually 6 to 15 in. high . . R. parvulus 
Leaves 3-divided. one or all of the divisions on elongated foot- 
stalks and these divisions 2- or 3-divided by- deep sinuses. 
Sepals reflexed (lig. 5, pl. 396). 
The terminal leaf division only on a lengthened foot-stalk 
oP Yolptein lat Wael efi wn) te NR chy. a gle a CERO 
Sepals spreading. 
_ of the leaf divisions on a fengthened foot-stalk 
. R. septentrionalis 
” Leaflets with segments “mostly rounded at apex 
° R.  fascicularis 
Leaflets with segments mostly “acute at apex R. hispidus 
