[ 237 ] 148 



Psoralea cuspidata (Pursh.)— (P. cryptocarpa^ Torr. and Gr. ; vkh Fl. N. 

 Am., Siippl., p. 668.) Nuked lulls of the Missouri, near White river ; 

 July 5. 



Psoralf^a lanceolata, (Pursh.) Sand-bars of the Upper Missouri— si/<e fl. 



At/ioip/ia/ruclicosa, {Lhm) With the preceding ; May 22. 



Atnorpha canescens, (N'itt.) Prairie region between the Missouri and Mis- 

 sissippi; abundant; July 16. 



Awnrplia nana, (Nutt.) Hills of Missouri, near White river ; June 18. 



Petalostemum. candidum, (Michx.) High prairies of the Missouri and 

 Mississippi ; July 13. 



Petalusteinum violaceian, (Michx.) Prairies, sources of the St. Peter's ; 

 August 25. 



Dalea alopeciiroides, (Willd.) Banks of Spirit lake, <fec. ; October \—fr. 



Hosac/da Purshiana, (^Beuth.) Naked hills of the Upper Missouri ; June 16. 



Astnignias hi/poqhttis, (Linn.) High prairies and river alluvions, Upper 

 Missouri ; June 16. 



Astragalus caryomrpus, (Ker.) Leaflets manifestly petiohilate, narrowed 

 at the base ; peduncles about the length of the leaves; raceme 6-10 

 flmvered ; calyx hirsute, with blackish hairs, teeth one-third the 

 length of the tube ; corolla bright violet purple, Ihree-lourlhs of an 

 inch long; legume immature. Black Snake hills. Upper Missouri, 

 I,o\ver St. Peter's river, and high prairies between the Missouri and 

 Mississippi ; April 17. 



Astragalus racemosus, (Pursh.) Dry, argillaceous hills, Upper Missouri ; 

 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,*numerous ; legumes (very small) ovate, sessile, inflated 

 depressed, abruptly acuminate ; calyx semi-ovate, hirsute ; lube twice 

 the length of the acute teeth ; roois long and slender, with the taste 

 of liquorice; stems l^ foot high, moderately branched; leaflets three- 

 fourihs 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 spicalus, (Nutt, 7) Canescently hirsuie, 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 spreadiwg ; calyx cylindrical-oblong, very gibbous at 

 the base; ti'efh oue 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, (Dougl.) Fertile, elevated prairies between Shayen- 

 oju and Red rivers, «fcc. ; July 25. 

 Oxylrnpis Lumber li, (Pursh.) Densely silky pubescent ; stems nearly 

 subterranean ; leaves with very long petioles ; leaflets 9 — 1 1 pairs, 

 lanceolate and elliptical lanceolate, acute, pubescent on both sides; 

 stipules lanceolate, adnate to the petiole ; peduncles \ — \ longer than 



