210 COMPOSITE. 



Abundant in shallow pools and on muddy banks of tidal streams; occa- 

 sionally on higher lands; flowering throughout the year. 



2. 0. AUSTRAiis (Sieb.), Hook. f. Slender, not fleshy, very diffusely 

 branched: leaves bipinnately dissected into linear lobes and somewhat 

 pubescent: heads small; pistillate fl. in 2 rows, their achenes pedicelled, 

 those of the disk less so.— Plentiful in gardens, and along some streets 

 in San Francisco and elsewhere. Feb. — June. 



62. TANACETUM, Pliny (Tansy). Kobust aromatic perennials, leafy 

 to the corymbose summit. Leaves ample, 2 — 3-pinnately dissected into 

 very many divisions or lobes. Heads discoid, erect. Eeceptacle naked. 

 Flowers yellow. Anther-tips broad, obtuse. Achenes truncate, and 

 with a coroniform-dentate pappus. 



1. T. camphoratum, Less. Camphoric-aromatic, villous-tomentose,' 

 very stout but decumbent, the stems 1 — 3 ft. long: pinnse and segments 

 of the very large leaves much crowded: heads in a large corymbose 

 cluster, short-peduncled, the low-convex disk 3lj in. broad; achenes 

 '4-angled. — Abundant on sand dunes about Point Lobos, etc. Aug.— Dec. 



63. ARTEMISIA, Diosc. Bitter-aromatic herbs and low shrubs. 

 Leaves alternate. Heads discoid, small, paniculately disposed, usually 

 nodding. Flowers whitish or yellow, often sprinkled with resinous 

 globules. Anther-tips slender and pointed. , Achenes obovate or oblong, 

 usually with small summit and no pappus. 



* Shrubby species. 



1. A. Californica, Less. Branches ascending, 2 — 4 ft. high; leaves 

 cinereous with a minute appressed pubescence, terebinthine-scented, 

 the lowest parted into a few linear-filiform segments, the upper entire : 

 heads many, in leafy panicles; involucre 2 lines broad: achenes broadish 

 and truncate at summit, with a squamellate or coroniform-dentate 

 pappus. — Southward and westward slopes of hills. Sept. — Dec. 



* * Herbaceous species; perennial (except n. 4). 



2. A. pycnocephala, DC. Stout, erect, simple, very leafy up to the 

 dense close ihyrsoid or virgate panicle, densely silky-villous even to the 

 involucre: leaves 1 — 3-pinnately parted into few and short linear or 

 spatulate lobes: heads 2 lines broad, only the marginal fl. fertile; style 

 of the disk fl. undivided and tufted at apex: achenes glabrous; pappus 

 none. — Sandy hills and shores about the Bay. Aug. — Dec. 



3. A. dracunculoides, Pursh. Stems clustered, ascending, 2—4 ft. 

 high, virgately branched: herbage glabrous, pungent-scented when 

 bruised, but neither aromatic nor bitter: lowest leaves 3-cleft at summit, 

 the others linear, entire: heads little more than a line broad. — Mostly 

 beyond our limits eastward and southward, but said to occur at Black 

 Point, San Francisco, and near Lake Chabot. Aug.— Nov. 



