Grindelia
(named in honour of David H. Grindel, a German botanist, 1766-1836). SYN. Donia. ORD. Compositae. A genus containing about twenty species of hardy or nearly hardy, biennial or perennial, shrubby or herbaceous plants, natives of North America and extra-tropical South America. Flower-heads yellow, solitary at the ends of the branches, and from 1in. to 2in. across. Leaves alternate, sessile or semi-amplexicaul, often rigid, dentate, or ciliato-serrate. Grindelias are of easy culture in peat and loam. Propagated by seeds, sown in spring or autumn, in a cool greenhouse or frame; by cuttings; and by divisions.
G. arguta (sharp). fl.-heads yellow. July and September. l., lower ones spathulate; upper ones linear-oblong, serrated, one-nerved. Stem simple. h. 1ft. Mexico, 1822. Herbaceous, hardy. (B. R. 781, under name of G. angustifolia.) G. glutinosa (glutinous).* fl.-heads yellow; involucres viscid. January to December. l. ovate-oblong, serrated, evergreen. h. 2ft. Peru, 1803. Shrubby, nearly hardy. (B. R. 187.) G. grandiflora (large-flowered).* fl.-heads deep yellow or orange, which, prior to expansion, is covered with the glutinous balsamic secretion occurring in some other species of this genus, large, about 1 1/2in. across. Summer. l., radical ones spathulate; cauline ones sessile, clasping, dentate. Stem branching near the top. h. 2 1/2ft. to 3ft. Texas, 1851. Hardy biennial. (B. M. 4628.) G. inuloides (Inula-like).* fl-heads yellow. June to September. l. sessile, oblong-lanceolate, acute, serrated at end, not viscid. h. 1 1/2ft. Mexico, 1815. Shrubby. (B. M. 3737; B. R. 248.) G. speciosa (showy). fl.-heads yellow, nearly 3in. across, covered, to a considerable thickness, with a transparent glutinous varnish. h. 2ft. Patagonia, 1852. Shrubby, nearly hardy. (L. & P. F. G. iii. 290.) G. squarrosa (squarrose). fl.-heads yellow; scales of involucre filiform at end, revolute, squarrose. July to September. l. oblong, amplexicaul, serrated. h. 2ft. North America, 1811. Herbaceous, hardy perennial. (B. M. 1706, under name of Donia squarrosa.)