Se 
440 . DESCRIPTIONS OF NEW SPECIES 
and connected together in a circle, which is quickly deciduous in the mass, 
—Perennial plants of Upper California, with erect, or low, decumbent, 
spreading stems. Leaves entire, laciniated, or pinnatifid. Branches leafy, 
one or two-flowered: flowers large and white. Allied to Leptoseris, but with 
a widely. different aspect, and much more compound capitulum, &c. Also 
to Andryala varia in the pappus, and in the presence of an outer, paleaceous, 
minute crown; but wholly distinct in habit, pubescence, colour of the flower 
and, achenium, which last, in Andryala, is cylindric and ten-ribbed; the 
whole, however, form a very natural group, with its usual gradations of 
- (The name is given in allusion to the remarkable colour of the 
_ Leucoseris * sazxatilis; stem leafy and decumbent; leaves oblong or linear- 
oblong, amplexicaule and auriculate; the radical lanceolate, subserrate, beneath 
hirsute; lower leaves now and then irregularly cleft, or somewhat pinnatifid 
towards the base; flowers large and white. 
Has. St. Barbara, on shelving ‘Tocks near the sea. Flowering in April. A large spreading 
perennial, with terete, hollow stems, spreading out in a circle of one and a half to two feet. The 
wes are rather thick and somewhat succulent, two to three inches long, by about half an inch 
i; the young shoots pubescent. Flowers fastigiate, pure white, as large as those of the Dan- 
~delion. Florets one hundred, or more, in a capitulum, ligulate, flat, deeply cleft at the summit, the 
‘segments obtuse and glandular, the tube very hairy. Style and stigmas slenderly filiform, exserted, 
nearly smooth: pedicel enlarging owas the base of ib capitulum. Involucrum smooth, of many 
“equal, linear segments, in about two s¢ = 
; m somewhat squarrose, imbricated in two or 
. three series, the segments lanceolate, pearinaies "Raseptacle wide and convex, merely punctate. 
Achenium dark brown, very short, obtuse at each end; the pappus pure white and silky, 
three times the length of the fruit, softly barbellated towards, pik at the base, 
ot single series of about thirty rays. 
about 
collected into a 
ba Saite 
Si eet: 
Leuchsehis * tenuifolia; suffruticose and smooth, erect and branching; leaves 
sessile, laciniately pinnatifid, segments narrow, long and linear, upper ones 
entire, filiform; capituli few, corymbose. 
Has. St. Barbara, on the mountains near the town. The expanded flower and fruit I have not 
seen, and I only place this plant here by its approximating habit. Two or three feet high, having 
‘& cons iderable a owee  aaaabe and involucellum as in the preceding, but the segments 
