132 ■ LEGUMINOStE. [Trifolmm. 



Sect. Ill, TRiroLiASTRUM. Ser. 



6. T. repens; caule repente radicante, foliolis obcordatis serrulatis, capitulis axillaribus 

 globosis, floribus subumbellatis post florescentiam deflexis, dentibus calycinis inasqualibus 

 corolla brevioribus, legumiiiibus tetraspermis. — Linn, Sp. PL p, 1080. Engi. BoL L 1769, 

 Mich, Am, v, 2, p, 59. Fursh, Fi, Am, v. 2, p, 477. Elliotty Carol, v, 2, p. 201. BigeL Fl, 

 Bost ed, 2, p, 271, 



Hab. Canada, Lad]/ Dalhousie ; Mrs. Sheppard ; and from Lake Huron, (JDr. Torfc/,) to the Saskatchawan, 

 in lat. 54^, Dr. Richardson; Drummond, — Abundant in tbe grassy vallies of the Rocky Mountains and 

 Blue Mountains, on the West side of North America. Douglas. — Pursh says it makes its appearance where- 

 ever the lands are cleared of timber. 



Sect. IV, Lupinaster. Ser, 



7. Jl megacephalnm ; adscendens, hirsutum, foliolis 5-7 oblongo-cuneatis mucronatis 

 spmuloso-denticulatis, stipulis magnis ovatis splnuloso-serratls, capitulo (maximo) ovato- 

 globosoj calycis tubo brevissimo, dentibus subulatis longissimis vexillo amplissimo cir- 

 cumvoluto brevioribus, legumine stipitato. — Nutt, Gen, v. 2. p, 105, De Cand, Prodr, 

 V, 2, p, 204.— Lupinaster macrocephalum, Pursh, FL Am, v, 2, p, 479. t, 23. 



Caules decumbentes, fere podales, vix ramosi, patentim hirsuti. Folia longe petiolata, foliolis 5-7 

 oblongo-vei obovato-cuneatis, basi attenuatis, mucronatis, raargine spinuloso-denticulatis, pilis longiusculis 

 magis minusve vestitis, adultis glabris, omnibus subrigidis, oblique pulcherrime yenosis. Stipules unciam 

 sesquiunciam longae, foliaceae, striatse, ovatae seu ovato-lanceolatse, versus apicem nonuunquam laciniatae, 

 margine spinuloso-serratae. Capitulum terrainale, maximum, ovato-globosum, multiflorum, involucro nuUo. 

 Flares duas fere uncias long?. Calyx ; tubo piloso, brevissimo, carapanulato, dentibus, seu laciniis, setaceis, 

 longissimis, sericeo-plumosis, corolla brevioribus. Vexillum ampHssimum, ovatum, acuminatum, obtusum, 

 subbifidum, basi latissimo minime unguiculato carinam alasque oranino obvolvens, liberum. AI(B carinaque 

 sublineares, subaequales, infeme una cum filamentis 9, in unum corpus coalitse: Filamentum superius liberum. 

 Antherce oblongse, flavse. Pistillum oblongum, valde compressum, dorso supeme hirsutissimum, inferne in 

 stipitem attenuatum, dispermum. Stylus filiformis. 



Hab. Common on moist elevated grounds, near the sources of the Columbia, and upon the Blue 

 Mountains, North -West America. Douglas. — This is a truly magnificent species, no less remarkable for its 

 numerous leaflets than for its great head of very large flowers, and above all, the broad lower half of the 

 vexilhtm, which quite envelops the rest of the floral coverings. 



h 



Sect. V. Involucrarium. 



r 



8. T, microcephalum ; adscendens, ramosum, foliolis obcordatis denticulatis integris 

 emarginatisque, stipulis ovatis acuminatis ciliato-Iaciniatis, capitulis (parvis) subrotundis, 

 involucro monophyllo multifido, segmentis aequalibus integris, dentibus calycinis 5 Eequali- 

 bus rectis e lata basi subulatis longitudine corollse. — «. hirsutmn; ubique hirsutum. Pursh, 

 Fl, Am, V, 2, p, 478. De Cand. Prodr. v, 2. p, 207. — /3 glabrum ; ubique pilis destitutum. 



Hab. a. First discovered by Mr. Menzies in California; then found by M. Lewis on the banks of Clarck'a 

 River, (^Pursh.) About Fort -Vancouver. Dr. Scouler. — /3, In the same situation as the last, and in the 

 interior of North-West America, near springs. Douglas. — This, and the remaining species of the present 

 groupe, are remarkable for the curious monophyllous involucre with which the heads of flowers are sur- 

 rounded at the base. There are other Trifljha with the same character ; and all are, I believe, inhabitants 

 of the New World, and confined to the Pacific side of the great chain of mountains. The present is the 

 least of the kind, having very small keadsy and an involucre cut nearly half-way down into about nine equal, 

 entire, much acuminated, and pungent segments. 



