252 



XLVi. COMPOSIT.E : COKYMBIFER^. I31atricdria. 



* Achencs of the disk and ray similar, Leucanthemum. 



1. C.^ Leucdntliemum L. (great wJiite O.) ; leaves oblono- obtuse 

 cut and pinnatifid at the base, radical ones obovate petiolate 

 stem erect branched (ray white). E, B. t. 60L ' 



Dry pastures, abundant. 1^. 6 — 7. — Stems I — 2 feet high, fur. 

 rowed. Heads of flowers large, then- disk yellow, the ray white, 



•^* Achenes of tfie ray angled and somewhat winged, 



2. C. segetiun L. {Corn Marigold, yelloiv O.) ; leaves am- 

 plexicaul glaucous inciso-sei'rate above toothed at the base 

 (ray yellov/). E, B. t. 540. 



44. Mathicaria Linn. Wild-Chamomile. Feverfew. | 



Achencs all angulai', crowned with a large epigynous disk. 

 Pappus a membranaceous border, or wanting. Receptacle naked.' 

 Involucre conical, hemispherical or nearly flat, the scales imbri- 

 cated, usually membranaceous at their margins. — learned from 

 its reputed medicinal virtues. 



_ 1. M. PartUnium L. {common F.) ; leaves petiolate flat 

 bipiimate the segments ovate cut, peduncl.es branched corym- 

 bose, stem erect, involucre hemispherical downy, receptacle 

 convex, pappus short toothed. Pyrethrum Sm. : E. B. 1. 1231. 



Waste places and in hedges. IjL. 7— 9.— Stem 1—2 ft. high, 

 branched. Bisk yellow; ray very short, white. Plmit bitter and tornc.' 



1. M._ inodora L. (Corn W., or scentless Mayiveed) ; leaves 

 sessile bipinnatifid the segments capillary, stem branched spread- 

 ing, receptacle convex, pappus entire or 4-lobed.— a. receptacle 

 ovate, "scales of the involucre lanceolate with a fuscous torn 

 margin."— ^a5. Pyrethrimi Sm.: E.B. t. 676.-/3. mnritirmm; 

 leaves fleshy, receptacle hemispherical " scales oblong with pale 

 entire margin." Bab. M. maritima L. Pyrethrum E. B. t. 979. 



Fields and way-sides, common. — ;S. sea-coast in many places 



especially in Scotland. ©. 6—n.~Stem about 1 foot high.' 



Flowers large, upon long naked peduncles. Disk very convex • ray 



large. Plant slightly aromatic. Achenes with 3 prominent thick smooth 



ribs, and more or less rugose intermediate species ; of these last the 



two internal ones are narrow, the external one broad and marked at 



the apex with an imperfect smooth rib, on each side of which there 



IS an oblong smooth glandular depression. In the var. 0. the ribs 



are broader than in var. a., and consequently all the intervening 



spaces and the grandular depressions are narrower ; but thev seem to 



vary in this respect in the same head. 



3. M. Chamomilla L. (loild C.) ; leaves glabrous bipinnatifid 







ceoi 



Corn-fields, frequent ; rare about Edinburgh, Q. 6 — 10, — One 

 f(»ot or more high. Flowers large, deep yellow. ' T 



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