2CG COMPOSITE, (composite family.) 



weed, with large and hliowy lieads : in Connecticut is a variety with inconspicu- 

 ous rays. (Nat. from Eu.) 



2. L. rAUTiiENHJM, Uodron. (Fevkrfkw.) Tall, hranched, leafy ; leaves 

 twice-pinnately divided ; the divisions ocatc, cut ; heads conjmlied, rather small. 

 (Matricaria rarthcniiim, L. ryrcthrum Partheuium, Smith.) — Escaped from 

 gardens in some places. (Adv. from Eu.) 



55. MATRICARIA, Tourn. Wild Chamomile. 



Heads many-flowered ; the rays pistillate, or wanting. Scales of the involu- 

 cre imbricated, with scarious margins. Receptacle conical, at least in fruit, na- 

 ked. Achcnia angular, wingless. raj)pus a membranaceous crown or border, 

 or none. — Smooth and brandling herbs (ours annuals or biennials) with di- 

 vided leaves and single or corymljcd heads. Rays white or none : disk yellow. 

 (Mamed i'or reputed medicinal virtues.) 



1. M. ixouoRA, L. Leaves twicc-pinnatcly divided into fine almost filiform 

 lobes; heads Uirgc, nakcd-pedunclcd, and with man y long raijs; pappus a short 

 crown or border. — (Wild far northward.) Roadsides, Eastport, Maine, Prof. 

 Venill. Aug. (Adv. from Eu.) 



2. M. discoidea, DC. Low (6' -9' high); leaves 2 - .3-pinnatcly parted 

 into short linear lobes; hads nvjltss, short-ped uncled ; scales of the involucre 

 oval, with broad margins, much shorter than the conical disk; pappus obsolete. 

 — Banks of the Mississipiii opposite St. Louis. Probably an immigrant from 

 Oregon, now extending eastward : also established in N. Europe. July- Sept. 



56. TANACETUM, L. Tansy. 



Heads many-flowered, nearly discoid, all fertile ; the marginal flowers chiefly 

 pistillate and 3-.5-toothed. Scales of the involucre imbricated, dry. Recep- 

 t.icle convex, naked. Achenia angled or ribbed, with a large flat top. Pap- 

 pus a short crown. — Bitter and ncrid strong-scented herbs (ours perennial), 

 with 1 - 3-pinnately dissected leaves, and corymbed heads. Flowers yellow ; in 

 summer. (Name said to be a corruption of aOavaala, undyimj, from its durable 

 flowers.) 



1. T. vulgXre, L. (Common Tansy.) Stem (20-4° high) smooth; 

 leaflets and the wings of the petiole cut-toothed ; corymb dense ; pistillate 

 flowers terete; pappus .5-lobcd. - Var. ndspuM has the leaves more cut and 

 crisped. — Escaped from gardens to roadsides. (Adv. from Eu.) 



2. T. Huron6nse, Nutt. Hairy or woolly when young, stout (l°-.''<' 

 high); lobes of the leaves oblong ; heads large (^'-§'wide) and usually few ; 

 l)istillate flowers flattened, 3-5-cleft; pappus toothed. — St. John's River, 

 Maine (G. L. Goodale), shores of the upper Great Lakes, and westward. 



57. ARTEMISIA, L. Wormwood. 

 Heads discoid, few- many-flowered ; the flowers all tubular, the marginal 

 wcs pistillate, or sometimes all similar and perfect. Scales of the involucre 

 Imbricated, with dry and scarious margins. Receptacle small and flattish, na- 



