130 



LEGUMINOS^. [ TrifoHum. 



longius, coriaceum, mono-aut oligospermum vix dehiscens, forma varium. — Herbae 

 sUpulce petiolo adnata. Folia pinnatim B-foUolata, folioUs scBpe dentatis, Flores laxe 

 racemosi) flavi aut rarius olhL DC, 



1. M. officinalis; leguminibus dispermls ovatis rugosis, racemis laxis, coroUis calyce 

 plusquam duplo longioribus, petalis subsetjualibus, caule erecto. Willd, — De Cand. Prodr, 

 V. 2. p. 186. Pursh, FL Am, v, 2. p. 477. Elliott, Carol, v. 2. p. 199.— Trifolium 

 officinale. Linn. — EngL Bot. t. 1340. 



Hab. About Montreal and Quebec. Ladi/ Dalhmtsie; Mrs. Percival — Naturalized. 



5. TRIFOLIUM. Zinn. 



Col. tubulosus persistens eglandulosus S-fidus, laciniis subulatis. Carina alis et vexillo 

 brevior. Stamina diadelpha. Legumen parvum vix dehiscens saepius ovatum 1-2-- 

 spermum calyce brevius et ab eo tectum, rarius oblongum 3-4-spermum calycem 

 paululum superaiis. — Herb£e. Stipulae petiolo adnatce. Folia palmatim tri-aut rarissime 

 ^foliolata, Flores capitaU aut dense spicati, hracteacti, purpurei, albi aut ochroleitci, 

 Petala in guibusdam omnia inter se basi coalita, DC. 



Sect. I. Lagopus. Ser. 



I. T, altissimum; glaberrimum, caule erecto elato, foliolis lineari-lanceolatis denticu- 

 latis petiolo longissimo, supremis subsessilibus, stipulis lanceolato-acuminatis petiolo 

 utriiique adnatis, capitulo oblongo, calycibus glaberrimis, dentibus 4 superioribus 

 tortuosis. (Tab. XLVIII.) — Douglas^ MSS, in Herb. Hort Soc. 



Caulis erectus, strictus, 2-3-pedaliSj herbaceus, striatus, glaber, superne parce ramosus. Folia trifoliolata, 

 glabra, caulina radicaliaque longissime petiolata; svprema subsessilia, omnia lineari-lanceolata, apiculata, 

 subtilissime oblique striata, minute denticulata, pallida viridia, rigida. Stipulce magnse, foliacese, striatae, 

 longissimae, Uneari-lanceolatae, acuminatze, apice integrae vel denticulate, petiolo utrinque per totam fere longi- 

 tadinem adnatse, cauli appressse, margiue anteriore liberse. Pedunculi subterminales, digitem et ultra longi, 

 glabri. Capifula ovalia, multiflora, ebracteatii. Flores majusculi, rubri, inferiores reflexi. Calyces dense 

 4^6positi, glabecriwi, striati, membranacei. Tubus campanulatus, subinflatus, dentibus 4 superioribus aequali- 

 bus tubi longitudine, inslgniter circa tubum corolke (utrinque duobus) subspiraliter incurvis et quasi 

 tortuosis, dente inferiore reliqiiis longiore tubum corollae aequante, recto. Corolla calyce duplo longior; 

 petalis staminibusque in tubum simplicem basi inflatum unitis, Germen ovatum, compressum, Iseviter mar- 

 ginatum, glabnim, monospermum. Stylus longus, filiformis, glaber. Stigma obtusum. 



Hab.- Abundant in Nortb-West America, between tbe Spohan River and Kettle Falls of the Columbia. 

 Fu June — August. Douglas. — The somewhat spiked heads of flowers, and the great aflinity in habit of this 

 plant with the following, have induced me to place it in the family of " Lagopus" although it departs from 

 it in the entirely glabrous calyces. The structure of this calyx is very remarkable : the lower tooth or 

 segment alone is straight, the four upper ones, two on each side the corolla, bend downwards and inwards in 

 a sort of spiral manner, so as to surround the tube of the latter, their points meeting on the opposite side. 

 At first, these teeth appear to be unnaturally twisted and distorted; but when they are examined with care, 

 the mode and direction of the curvature are found to be invariably the same. 



Tab. XLVUL Fig. 1, Flower; Jig. 2, Calyx laid open, and seen from within; fig. 3, Front view of the 

 Corolla; Jig. 4, Y\s^\i-^magnified. 



2. 71 plumosum; sericeo-pubescens, caule elato erecto, foliolis lineari-lanceolatis 



