513 
above, below sprinkled with pellucid glandules and sparingly his- 
poo on the larger nerves, the margins subciliate. The leaf- 
ets are somewhat variable in form, but are commonly blunter and 
more obovate-cuneate than those of /zrsufa, with broader, less 
acute teeth, the marginal pattern mostly coarsely crenate-dentate 
to boldly crenate; sometimes they are throughout narrowly ob- 
Ovate-oblong with broad, shallow, semicrenate teeth; on the re- 
duced often trifoliate upper leaves they may be very narrow and 
sharply dentate-serrate. Interposed leaflets elliptic to obovate, 
acute, often confined to the distal interspace, usually a small or 
minute entire pair, occasionally larger and dentate-lobed, rarely 
with 4 minute pair on either side. Stipules smaller and narrower 
than in hirsuta, rarely becoming 14’ wide, often very small, lance- 
olate to semi-cordate, cut-serrate to deeply incised, the lowest of- 
ten entire. Inflorescence varying from a short terminal raceme 
*e a delicately branched nearly naked loose panicle, the glandu- 
Ose racemes only 3/6’ long and rather loosely flowered. Flowers 
very small, 2/3” wide, pale yellow, on slightly spreading pedicels 
I’ or less long; anther-cells contiguous. Bracts minute, ciliolate ; 
bracteoles ovate, 3-lobed or entire. Flower-buds subglobose, al- 
Most truncate, the sepals ovate-oblong, obtuse, downy-canescent 
within the apical margins. Mature fruit subspreading or nod- 
ding, very small, 1-114” wide, the body subhemispheric, 1’ long 
below the marginless rim, pellucid-glandulose, bristles few and 
Weak, short, erect and slightly spreading, equalled or exceeded by 
the truncate calycular process which caps the very tumid disk ; 
Sulcae rather broad and shallow, converging into the narrow and 
Curved stipe-like base. Roots developing tuberous thickenings 
which reach a size of 3’ X 2”; elongated roots sometimes show two 
or three successive swellings. (Plate 283, fig. 6.) 
Hilly woodland, mostly in light rich soil; of scattered growth, 
or forming loose colonies, but never massed in close groups. 
Begins to flower at New York from about the middle to the 
end of July and continues to bloom into early September. 
. This species need be compared only with A. Aursuta which, in 
its stouter forms, it sometimes closely resembles. It differs most 
obviously in its tuberous roots, lesser size and more slender habit, 
nearly glabrous stem and branches, delicate short racemes, smaller 
flowers with obtuse sepals, much smaller hemispheric fruit with 
unmargined disk and few mostly erect bristles, smaller narrower 
stipules and more crenate leaves. The leaves, generally fewer than 
in A. hirsuta, are more obovate in general outline, the more slender 
leafstalk rougher below and more narrowly and deeply grooved 
along the upper side, the leaflets mostly more obversely broadened - 
