172 45. COMPOSITE. 
2. C, segetum (L.); 1. glabrous toothed dilated outwards and 
lobed, upper 1. clasping, phyll. ovate obtuse with a broad mem- 
branous margin, florets of the ray yellow.— E. B. 540.—St. a foot 
high, alternately branched, angular. L. incise-serrate or lobed 
in the upper part, simply toothed below. Heads solitary, ter- 
minal.—Corn-fields. A. VI.—VIII. Corn Marigold. 
16. (18.) Marricarta Linn. 
* TInvolucre conver. PYRETHRUM Sm. 
1. M. Parthenium (L.); 1. stalked pinnate, segments ovate or 
oblong pinnatifid, lobes cut, st. branched, heads corymbose, phyll. 
linear obtuse, receptacle convex, fr. crowned with a short jagged 
membrane.—E. B. 1231.—St. erect, 2 feet high, branched, fur- 
rowed, panicled. ITeads in small corymbs terminating the stem 
and branches, disk yellow, ray white.—Waste places, not very 
common. P. VI. VIII. Feverfew. 
2. M. modora (L.); 1. sessile pinnatifid in numerous capil- 
lary pointed segments, st. branched, heads solitary, phyll. lanceolate 
obtuse, receptacle ovate, fr. rugose and with 2 round glandular 
dots on the external face just below the elevated entire border.— 
E. B. 676.—St. erect, 12—18 in. high, smooth, angular. L. in 
very narrow elongated mostly alternate segments “fwrowed 
beneath.” Heads solitary, terminating the branches, margin of 
phyll. cut and fuscous, ray white, disk yellow. Fr. with 3 pro- 
minent smooth ribs; intermediate spaces rugose, 2 narrow and 
internal, 1 broad and external.—A maritime form of this is often 
taken for the next species.—Fields and waste places. A. VII. 
VIIL. 
3. MW. maritima (L.) ; 1. sessile doubly pinnate, segments fleshy 
linear entire bluntish convex above, principal ribs keeled beneath, 
st. branched diffuse, heads solitary, lee lanceolate obtuse, fr. 
slightly rugose and with 2 elongated glandular spots on the ex- 
ternul face yust below the lobed elevated border.—#. B. 979.— 
St. reddish. L. with short crowded mostly opposite segments. 
Heads as in AJ. inodora, but ray shorter in proportion ; “ margin 
of phyll. pale and entire ;”” receptacle hemispherical. Fr. with 
3 prominent smooth ribs; a narrow intermediate rugose space 
externally, 2 internal spaces reduced to simple lines. —Sea-shores. 
P. VII. VIII. 
** Tnvolucre nearly flat. Marricaria Sm. 
4. M. Chamomiila (L.) ; 1. bipimnate smooth, segments capil- 
lary simple or divided, heads solitary, receptacle hollow conical, 
phyll. linear obtuse.— E. B.1232.—St. erect, 1 foothigh, branched. 
Heads on long naked stalks, disk yellow, ray white.—Cultivated 
and waste ground, A. VI. VII. Wild Chamomile. 
