[ 237 3                            148
Psoralea cuspidata (Pursh.)—(P. cryptocarpa, Torr. and Gr. ; vide FT. N.
Am., Suppl., p. 668.) Naked hills of the Missouri, near White river ;
July 5.
Psoralea lanceolata, (Pursh.)    Sand-bars of the Upper Missouri—sine fl.
Amorpha fructicosa, (Linn )    With the preceding ; May 22.
Amor plia canescens, (Nutt.) Prairie region between the Missouri and Mis-
sissippi; abundant; July 16.
Amorpha nana, (Nutt.)    Hills of Missouri, near White river ; June 18.
Petulostemum candidum, (Michx.) High prairies of the Missouri and
Mississippi ; July 13.
Petaloslemnm, violaceum, (Michx.) Prairies, sources of the St. Peter's ;
August 25.
Dalea alopecuroides, (Willd.)    Banks of Spirit lake, &c. ; October V—-fr.
Hosackia Purshiana, (Benth.)   Naked hills of the Upper Missouri ; June 16.
Astragalus hypoglottis, (Linn.) High prairies and river alluvions, Upper
Missouri ; June 16.
Astragalus caryocarpus, (Ker.)    Leaflets manifestly petiolulate, narrowed
, at the base ; peduncles about the length of the leaves ; raceme 6~10
flowered ; calyx hirsute, with blackish hairs, teeth one-third the
length of the tube ; corolla bright violet purple, three-fourths of an
inch long; legume immature. Black Snake hills, Upper Missouri,
Lower St. Peter's river, and high prairies between the Missouri and
Mississippi ; April 17.
Astragalus racemosus, (Pursh.) Dry, argillaceous hills, Upper Missouri j
May 24.
Astragalus gracilis, (Nutt.) Canescently pubescent ; stem slender, branch-
ed ; leaflets 5—6 pairs,.distant, narrowly linear, obtuse, petiolulate;
stipules linear lanceolate, with a broad base ; peduncles 2—3 times as
long as the leaves ; racemes opicate; flowers (white, tinged with blue)
erectopatulous'nurnerous ; legumes (very small) ovate, sessile, inflated
depressed, abruptly acuminate ; calyx semi-ovate, hirsute ; tube twice
the length of the acute teeth ; roots long and slender, with the taste
of liquorice ; stems 1£ foot high, moderately branched ; leaflets three-
fourths of an inch long, and less than one line wide, distinctly petiol-
ulate ; racemes 30—40 flowered ; pedicles somewhat recurved in fruit;
flowers one fourth of an inch long. Missouri hills, near the mouth of
Vermillion and L'Eau qui court rivers ; May 24.
Astragalus spicatus, (Nutt.?) Canescently hirsute, with appressed hairs;
stem much branched ; leaves on short petioles ; leaflets 8—9 pairs,
^ often alternate, elliptical, obovate, nearly glabrous above; stipules
minute, lanceolate; raceme 10—15 flowered, about as long as the
leaves; flowers Spreadisg ; calyx cylindrical-oblong, very gibbous at
the base ; teeth one-third the length of the tube, very obtuse ; legume
(immature) oblong-cylindrical, somewhat curved. Naked hills of the
Upper Missouri, and the adjoining prairies ; May 22.
' Oxytropis splendens, (Doug1.) Fertile, elevated prairies between Shayen-
oju and Red rivers, &c. ; July 25.
Oxytropis Lamberti, (Pursh.) Densely silky pubescent ; stems nearly
subterranean; leaves with Very long petioles; leaflets 9-r—11 pairs,
lanceolate and elliptical lanceolate, acute, pubescent on both sides;
stipules lanceolate, adnate to the petiole ; peduncles J—^ longer than