362 COMPOSITiE. Pectis. 



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



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

 tion): rays small, turning purplish. — Pectid'mm, DC. 



P. punctata, Jacq. A foot or more high, panicnlately 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. Unifotia, L. Amoen. 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: .pappus in some 

 flowers of one or two conspicuous erect and smootli paleaceous awns or rigid aristiform palea^, 

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

 nearly obsolete: rays conspicuous, turning purplish. 



P. imberbis, Gray. Wholly smooth and glaljrous: stems a foot or two high, paniculately 

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

 entire, sparingly punctate witli 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; 

 Eothrock in Wheeler Rep. vi. 172. — S. Arizona, Sauoita Valley, Wright, Rotkrock, &c. 

 (Adj. Mex.) 



Teibe VII. ANTHEMIDE^E, p. 77. 



170. LEUCAMPYX, Gray. (AcvK^Trui with white head-band; the 

 circle of In-acts 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, Geay in Porter & Coulter, 1. c. Perennial herb, a foot or two high, with 

 the as]iect and some of the clmracters of Hymenopappus (except the rays), flocculent-wooUv, 

 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 : ravs 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. — Canons, &c., S. W. Colorado, ytwbcrri/. Porter, Bran- 

 degee. Also W. New Mexico, Loew. 



171. ANTHEMIS, L. Cii.uiOMiLE. (Ancient Greek and L.atin name 

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

 large heads on peduncles terminating the branches ; disk-flo^yers yellow ; rays 

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

 genus, one or two .species naturalized. 



_A. CoTL-LA, L. (Mayweed.) Annual weed, of the section Mveuta, has receptacle of the 

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

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

 le.-ivcs finely 3-iiiiiii:itely dissected: herbage unplcnsantly strong-scented, acrid. — Sjiec. ii. 894; 

 Barton, Veg. Mat. Mod. t. 14. Maniln felidci, Cass. 1 )"ict. xxix. 1 74. .1/. Cotuia, DC. Prodr. 

 vi. i3. — Common in waste grounds an.l al.mg roadsides ; fl. late summer and autumn. (Xat. 

 from Eu.) 



»A. arvensis, L. (Field Chamomile.) Annual wood, not unploasantlv scented : leaves 1-2- 

 pinnately parted into linear-lanceolate lobes: lieads rather loii^-pednnclod : br.icts of invo- 

 lucre obtuse, whitishscarious: recejitaele conical; its bracts lanceolate, acuminate: ravs 

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

 t. M-A- Fl, Dan, t. U79; DC. Prodr, vi, 6,-Old fields, sparingly established iu the Atlantic 

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



