August 5, 1909 '' > l 



comparison of dissected floral parts of this material and of the 

 type number material of T. Aitonii show them to be identical 

 in structure. The plant looks like what we consider latifolium 

 in every way, except that the flower heads are somewhat larger 

 and the leaves considerably so. The fact that the plant called 

 T. Aitonii comes from the same general region as the original 

 T. longipes var. latifolium inclines us to the belief that T. Ait- 

 onii is a large form of T. latifolium. 



Until we are able to see the original plant upon which 

 Hooker based his var. latifolium, we shall consider Sandberg's 

 plant from Kootenai county, Idaho, collected July, 1887, as typ- 

 ical, and describe it as follows: 



A low creeping perennial plant, resembling very much the 

 common white clover (T. repcns) in habit and general aspect. 

 There are about fifteen creamy white flowers, which become 

 strongly reflexed in age, the pedicels also becoming gradually 

 linger as the head matures. 



Plant from 1 to 2 dm. high, not involucrate: stems ascend- 

 ing loosely and weakly from creeping rootstocks: stipules few, 

 ovate-acuminate, about 10 mm. long, lobes entire: leaflets vari- 

 able but all mjre or less rounded and mucronate at the apex, 

 some ova^e-rhomboid, glabrous above and slightly hairy beneath, 

 about 2^cm, long and 12 mm. wide, margins denticulate; peti- 

 oles sparingly pubescent, those of the lower leaves about 6 cm. 

 long: peduncles pubescent, 6 to 8 cm. long: heads terminal, 2cm. 

 in diameter when young, becoming larger at maturity: flowers 

 creamy white, completely reflexed in age by the deflexion of the 

 pedicels, which are 3 mm. long and hairy: calyx densely pubes- 

 cent, tube 2 mm. long, teeth 4 mm. long: vexillum 12 mm. long 

 and 5.5 mm. wide, apex with a very small mucronate tip; blade 

 of wings 7 mm. long and 2 mm. wide, rounded at the apex, au- 

 ricled at base, claw of wings 4.5 mm. long; blade of keel oblong, 

 4 mm. long. 2 mm. wide with a blunt apex: pods strigose-hairy, 

 two- seeded, seeds large. 



Watson, in his Bibliographical Index of North American 

 Botany, 264, is evidently mistaken in punting T. longipes var. 

 Pygmeum Gray, as a synonym of T. longipes var. latifolium. It 



