362 COMPOSITE. Pedis. 



# # Erect ano^comparatively tall annual, with leaves sparingly if at all setiferous at base: akenes 

 all with 2 or 3 corneous and subulate diverging smooth awns (rarely an ascending denticula- 

 tion): rays small, turning purplish. — Pectidium, DC. 



P. punctata, Jacq. A foot or more high, paniculately branched, very smooth : leaves linear, 

 with copious small oil-glands : heads slender-peduncled, quarter-inch long : involucre cylin- 

 drical, few-flowered, of 4 or 5 narrow bracts, involute in age. — Stirp. Amer. t. 128; L. Spec, 

 ed. 2, 1250 ; Griseb. 1. c. P. iinifolia, L. Amcen. Acad. v. 407, & Spec. 1. c, founded on pi. of 

 Browne and Sloane. Pectidium punctatum, Less, in Linn. vi. 706; DC. 1. c. 98. — S. W. 

 Arizona, Palmer, Smart, Lemmon. Not yet seen from Florida, where it would rather be 

 expected. (W. Ind., S. Calif., Galapagos.) 



# # # Erect and rather tall perennial, with leaves wholly destitute of bristles: pappu9 in some 

 flowers of one or two conspicuous erect and smooth paleaceous awns or rigid aristiform pales, 

 and 2 or 3 rigid squamellje, or sometimes all reduced to a crown of corneous squamelte, or 

 nearly obsolete : rays conspicuous, turning purplish. 



P. imberbis, Gkat. Wholly smooth and glabrous : stems a foot or two high, paniculately 

 branched, rather rigid and junciform, sometimes few-leaved : leaves narrowly linear, quite 

 entire, sparingly punctate with oil-glands : heads half-inch long, slender-pedunculate : invo- 

 lucre cylindrical, of 5 or 6 linear obtuse bracts, with margins strongly involute in age : rays 

 5 : disk-flowers 5 to 7, with lobes of corolla bearing a large dark gland. — PI. Wright, ii. 70 ; 

 Rothroek in Wheeler Rep. vi. 172. — S. Arizona, Sanoita Valley, Wright, Rothroclc, &c. 

 (Adj. Mex.) 



Tribe VII. ANTHEMLDE^E, p. 77. 



170. LEUCAMPYX, Gray. (Aei>Kd/i7™f, with white head-band; the 

 circle of bracts of the head white-bordered.) — Benth. & Hook. Gen. ii. 422; 

 Porter & Coulter, Fl. Colorad. 77 ; Eothrock in Wheeler Rep. vi. 175, t. 12.— 

 Single species. 



L. Newberryi, Gray in Porter & Coulter, 1. c. Perennial herb, a foot or two high, with 

 the aspect and some of the characters of Hymenopappus (except the rays), flocculent-woolly, 

 glabrate in age : leaves 2-3-pinnately parted into filiform-linear segments : heads few or 

 several at the naked summit of the stem : involucre nearly half -inch broad : rays three-fourths 

 inch long, obscurely 3-lobed at summit, at first yellow, soon changing to cream-color or white : 

 akenes 2 lines long, turning black. — Caiions, &c, S. W. Colorado, Newberry, Porter, Bran- 

 degee. Also W. New Mexico, Loew. 



171. ANTHEMIS, L. Chamomile. (Ancient Greek and Latin name 

 of Chamomile.) — Herbs, usually with pinnately dissected leaves, and rather 

 large heads on peduncles terminating the branches ; disk-flowers yellow ; rays 

 white, rarely yellow, fertile, except in the first species. A large Old-World 

 genus, one or two species naturalized. 



A . C6tdxa, L. (Mayweed.) Annual weed, of the section Makuta, has receptacle of the 

 head conical, destitute of bracts near the margin, bristly ones at the centre : rays mostly 

 neutral, white, sometimes abortive: akenes 10-ribbed, rugose or tuberculate: stem low: 

 leaves finely 3-pinnately dissected : herbage unpleasantly strong-scented, acrid. — Spec. ii. 894 ; 

 Barton, Veg. Mat. Med. 1. 14. Marutafcetida, Cass. Diet. xxix. 174. M. Cotula, DC Prodr. 

 vi. 23. — Common in waste grounds and along roadsides ; fl. late summer and autumn. (Nat. 

 from Eu.) 



A. arvensis, L. (Field Chamomile.) Annual weed, not unpleasantly scented : leaves 1-2- 

 pinnately parted into linear-lanceolate lobes : heads rather long-peduncled : bracts of invo- 

 lucre obtuse, whitish-scarious : receptacle conical; its bracts lanceolate, acuminate: rays 

 white : akenes with a very short slightly toothed margin in place of pappus. — Engl. Bot. 

 t. 602; Fl. Dan. t. 1179; DC. Prodr. vi. 6. — Old fields, sparingly established in the Atlantic 

 States, Oregon, &e. (Nat. from. Eu.) 



