396 COMPOSITAE 
4, a eg. Senne oie parthénium (L.) Bernh. Feverfew. Fig. 5678. 
S 0. 
Matricaria odorata Lam. FI. Franc. 2: 135. 1778. 
Chrysanthemum parthenium Bernh. Syst. Verz. Erf. 145. 1800. 
Pyrethru a Pees: um J. E. Smith, FI. aes Pitt 1800-4. 
Matricaria vulgaris S. F. Gray, Nat. Arr 7 Pl2 454. 1821, 
Much- ais leafy, aromatic ponte 2.5-10 dm. high, sparsely puberulent to glabrous, 
simple-stemmed or branched sa e base sok rom a taproot or stout caudex, branching paniculately 
above into a corymbose inflorescence. Leaves petioled, broadly ovate or ovate-oblong in outline 
4-10 cm eae the petiole one- sthird or less thee length of the Bias. the leaves somewhat reduced 
above, bipinnat ely or pinnately parted, the segments acute or ro unded ; s many, abou 18 
mm. wide including the white rays ; pylon aries 2- or — eriate, coriaceous and keel ed, lanceolate, 
en ee E ro ed t 
u , many more in double forms, 4— 3 mm eee oblong ; disk-flowers 2 mm. or more long, 
narrowly funnelform, somewhat glandular below and thickened at the ose: aehetes subterete, 
8-10- oan: pappus lacking ora anaue § own. 
of Europe g arden. often escaping; widely distributed but not common throughout the 
Pacific ‘St “ik es; also in sonar "tnd ves Poe States. Forms with double flowers as well as the usual single- 
flowered forms are often met with as adventives. May—Aug 
5. Chrysanthemum balsamita (L.) Baillon. Costmary. Fig. 5679. 
Tanacetum balsamita L. ee Pl. 845. 1753 
Balsamita major Desf. Act. Soc. Hist. Nat. Paris 1: 3. 1792. 
4. 
Pyrethru — var. tanacetoides Boiss. se ie 3: 346. 1875. 
Chrysanthemum balsamita Baillon, eer Pi.8: 1882. 
Chrysanthemum balsamita var. tanacetoides nek ex W. Miller in Bailey, Cyclop. Hort. 313. 1900. 
Balsamita balsamita Rydb. N. Amer. “ 34: 238. 1916. 
Coarse perennial 6-12 dm. high with 1 to several erect leafy stems arising from a stout caudex 
the herbage mint-scented, silvery- Sstrigtse throughout, becoming more or less glabrate especially 
below. Basal ant many, oblong or elliptic with a pare apex, Setiate d, the blade 15-30 cm. 
tong, about 3- . broad, crenate-margined, the — a little shorter than the blade; stem- 
ea p i 
white ipped with a 
conspicuous, erose, hyaline lobe; disk- Sooes glabrous, about 2 mm. long, tubular-funnelform, 
em to the 5 short lobes; achenes about 2 m tae with about 10 ibs’ pappus a small 
cro 
oe native of western Asia often grown in gard and occasionally becoming established locally in the 
ce: States; Whitman County, Washington, and in Je ae Hoo and Josephine Counties, Oregon. Aug.—Sept. Mint 
101. TANACETUM [Tourn.] L. Sp. Pl. 843. 1753. 
Aromatic, stout, erect, annual or perennial herbs from a rootstock, or low, cespitose, 
woody-based h erbs, or toate subshrubs. Leaves alternate, entire to 1-3-pinnatifid. In- 
florescence corymbiform or capitate or sometimes solitary at the ends of the branches. 
o vo i i 
acute to ¢ fe) tuse. ‘ee of the fears or marginal ones exserted, the branches short, 
" i¢ ; : 
obtuse or truncate and niinutely penicillate at the tip, those of ‘the disk-flowers included 
or shortly exsert enes commonly gerade ——— led or $viied, truncate at apex. 
appus none or coroniform. [Origin of the na bscure. 
A genus of about 5 
0 species, natives of the northern samen Type species, Tanacetum vulgare L. 
Heads numerous, 20-200, 5-10 mm. heuad: herbage glabrous or nearly so; introduced weed. 
> vx ing 
Heads oo 6-20, about 12-18 mm. broad; herba ill t 
= a flowers iene a ray; —. densely villous-tomentose. 2; TT. camphoratum. 
- 3. T. douglasit. 
ae sender herbe from a thickened candex,’s or subshrubs. 
3—S-cleft; receptacle nake: a 4. T. canum. 
— bi- or tripinnatifid; p hai 5. T. potentilloides. 
1. Tanacetum vulgare L. Tansy. Fig. 5680. 
Nom. 825 
