my 
38. Chrysanthemum. (Tourn.)L. 
eaves 
Perennial herbs with rootstocks and alternateXpinnately incised or 
pinnate, the terminal lobe being very much larger than the lateral ones, 
these sometimes wanting. Heads with or without ray flowers which are white 
when present. Involucres hemispherical, of several series of mostly oblong 
bracts which are overlapping and scarious at the tips; receptacle naked, 
flat or convex. Disc-flowers yellow. Achenes cylindrical, ribbed longitud- 
inally; pappus none. 
o Ray flowers present,-witreh-emey 20-25 mn. long I, Ce Leucanthemum 
0 Ray flowers wanting 2. C. Balsamita 
1. C. Leucanthemum L. var. pinnatifidum Leeoq & Lamotte. Ox-eve Daisy. 
Perennial herbs, the stems several, 30-60 cm. tall, erect, glabrous; basal 
leaves mostly spatulate, attenuate to a slender petiole 3-4 om. long, irreg- 
ularly toothed, the cauline leaves oblong or the lower oblanceolate, 3-5 cm. 
long, sessile, pinnately incised or pinnatifid, the lobes acute, both surfaces 
glabrous; heads showy, solitary at the ends of the stems, their involucres 
hemispheric, depressed around the stem, the bracts 3-7 mn. long, in 4-5 series, 
the outer lanceolate, acute, the inner oblong, scarious margined above the 
middle, all margined with brown;ray-corollas 20-22 mm. long, white, 20-30 in 
number; disc flowers yellow; achenes ribbed. 
Occasional in moist ground usually near habitations; introduced from 
Kurope.e = Sa ee —> 
> Priest Re Exp. Sta., Hpling 6602. 
26 Ce Balsamita L. var. tanacetoides Boiss. Perennial herbs with 
stems 60-80 cm. tall, puberulent; basal leaves oblanceolate or elliptical, _ 
long-petioled, the stem-leaves cblong or oval, their blades 4-8 om. long, bear- 
ing @ or 4 small lateral lobes or teeth at the base, the lower on petioles 1-1.5 
cme long, the upper sessile, all crenately toothed, the teeth 1=-1.5 mm. tall, 4 
both surfaces dull and somewhat canescent with small appressed hairs; heads 
numerous, rayless, arranged in terminal flat-topped clusters, their involucres 
hemispherical, the bracts in about 4 series, oblong, 3-4 mm. long, the tips 
scarious; disc-flowers subequal to the bracts, vellow. 
An occasional escape at lower elevations; introduced from Asia. > 
WH —? Clarkia, Hpling and Offord 8775. i 
