Home › S › Silphium (To the species described on p)

Silphium (To the species described on p)

To the species described on p. 435, Vol. III., the following should now be added:

S. albiflorum (white-flowered). fl.-heads sessile in the axils or stoutly pedunculate, 3 1/2in. across; involucre sub-globose; ray florets pale straw-coloured or creamy-white, narrowly oblong, bifid. September. l. ovate, pinnatifid or bipinnatitid, coriaceous, the uppermost ones linear; lobes linear, 2in. to 5in. long. Stem simple, 2ft. to 4ft. high. Texas. Plant clothed with short prickles. (B. M. 6918.)