COMPOSITAE 145 



long, deltoid-orate in their outline; segments lance-ovate, mostly cuneate and at- 

 tenuate at base; petiole 1 to 3 or 4 inches in length. Heads of flowers small, ob- 

 long, on long naked sulcate-angular axillary and terminal peduncles ; involucre 

 double, the scales connate at base, the outer ones about 8, rather shorter and nar- 

 rower than the inner ones ; rays obovate, yellow, with dark veins. Akenes about 

 % of an inch long, sprinkled with short erect hairs; pappus of 3 or 4 retrorsely 

 hispid awns. 

 Hob. Gardens, and cultivated lots: common. Fl. Aug. Fr. Octo. 



SUBTRIBE 3. HELENIE X AE. 



Disk-florets apparently perfect, but sometimes sterile ; pappus composed pf sev- 

 eral distinct chaffy-scales; receptacle naked or chaffy. 



206. Hi: I, i: \ 1 1 II . L. 



[Said to be named after Helen, the wife of Menelaus.] 



Heads many-flowered; ray-florets numerous, pistillate, cuneate, 3- 

 to 5-lobed at apex. Involucral scales in 2 series, the outer folia- 

 ceous, subulate-lanceolate, reflexed, the inner fewer and much 

 shorter, chaffy. Akenes turbinate, ribbed; pappus of 5 to 8 thin 1- 

 nerved acuminate or awned chaffy scales. Receptacle hemispherical, 

 nearly naked. Leaves alternate, sessile and decurrent ; heads ter- 

 minal on the corymbose branches ; flowers yellow. 



1* II. ;iiitiiiiinsilc, L. Stem angular, and somewhat winged; 



leaves lanceolate, acuminate, serrate; disk subglobose; rays 



drooping. 



AUTUMNAL HELENIUM. Sneeze-weed. 



Plant pale cinereous-green, from its minute pubescence : perennial. Stem 2 to 5 

 feet high, corymbose-paniculate, the branches angular and leafy. Leaves 2 to 4 

 inches long, narrowed at base. Heads of flowers middle-sized ; peduncles 1 to 2 

 inches long, thickened near the involucre ; rays strongly veined. 

 Hob. Margins of streams : frequent. Fl. Aug. Fr. Octo. 



SUBTRIBE 4. ANTHEMID'EAE. 



Heads radiate, or discoid, never dioicous ; disk-florets sometimes abortive ; anthers 

 without tails at base; pappus none, or a very small crown. Leaves alternate, 

 often much dissected. 



21. Heads of flowers radiate. 



207. MARIPTA, Cassini. 



Heads many-flowered ; ray-florets mostly neutral. Involucre hemis- 

 pherical. Akenes obovoid, ribbed ; pappus none. Receptacle prom- 

 inently convex, chaffy all over, or only at summit. Fetid annuals: 

 leaves bi-tri-pinnately dissected. 



1. M. C6tula, DC. Involucral scales with whitish scarious margins ; 



receptacle chaffy at summit, only. 



Anthemis Cotula. L. $ FL Cestr. ed. 2. p. 489. 



Fetid Chamomile. Richardson's Pink. Dog's Fennel. 



Stem 6 to 12 inches high, mostly erect, leafy, and bushily branched. Leaves 1 to 

 2 inches long, subsessile, green, bipinnately dissected ; segments linear, acute. 

 Heads of flowers terminal on leafless peduncles ; rays white, disk yellow. Recep- 

 tacle oblong-conical ; chaff subulate, shorter than the florets. 

 Sab. Tarm yards, lanes, &c. Nat. of Europe. Fl. June. Fr. Aug. 



