Leucanthemopsis (Giroux) Heywood

74. Leucanthemopsis (Giroux) Heywood View in CoL 1

Dwarf, caespitose, subscapose perennials. Leaves pinnatilobed to pinnatisect, eglandular. Capitula solitary. Receptacle convex. Ligulate florets female; ligules yellow, or white, sometimes yellowish at base or becoming pink. Inner florets hermaphrodite; corolla tubular-campanulate. Achenes all similar, 3- to 10-ribbed,

the ribs not prominent, the surface with one or several rows of mucilaginous cells on and around each rib; vallecular secretory canals absent.

Literature: V. H. Heywood, Anal. Inst. Bot. Cavanilles 12(2): 313-374 (1954); 32(2): 175-187 (1975).

1 Ligules white

2 Leaves oblong-linear, pinnatifid with7-15 lobes; ligules yellowish towards the base 5. pulverulenta 2 Leavesovate,linear-spathulateorspathulatewith5 -7apical or lateral lobes or crenations; ligules not yellowish towards the base

3 Leaves linear-spathulate, with 3-7 forwardly directed lanceolate lobes 2. pallida 3 Leaves ovate to spathulate, with 5 crenations at the apex or pinnatifid to palmatifid with 5-7 lobes 1. alpina 1 Ligulesyellow

4 Leaveslinear-spathulate, 2 -to7 -fidattheapexorwithnumer­

ous forwardly directed shallow incisions, or cuneate to orbicular-spathulate, incise-dentate 2. pallida 4 Leavesoblongtooblong-linear,pinnatifidtopinnatipartite, with 5-15 lobes

5 Densely caespitose, ±procumbent; leaf-lobes 5-9, oblong-linear, approximate; outer involucral bracts subglabrous, cibate 4. radicane 5 Laxly caespitose, ascending; leaf-lobes (5—)7— 15, lanceolate, distant; outer involucral bracts pubescent 3. flaveola