354 COMPOSITE. Flarcria. 



heads about 12-flowerecl, 3 lines long: no ray. (A few flowers once seen with a pap- 

 pus of 4 thin palea;!)— PI. FencU. 88, & PI. "Wright. 114. — Low grounds, on and near 

 the Rio Grande, S. W. Texas, Wright, Parrij, Blydoiv. (Adj. Me.K., Widizmus, Grei/n, 

 Palmer.) 

 JF. longifolia, Gkay, I. c. Eather stout, 1 to 3 feet high, pale : leaves from linear to lance- 

 olate, broadest or not narrowed at the closely sessile base, 2 to 5 inches long, entire or with 

 rare spinulose denticulations : heads in very ample cymes, lO-l.'5-flowered, often 3 lines 

 long: no ray: bracts of the involucre broad. — Gymnosperma'i oppositifolinm, DC. Prodr. 

 V. .312. — Not yet found on the Texan side of the Rio Grande. (Adj. Jlex.) 

 _F. linearis, Lag. Rather slender, a foot or two high: leaves from narrowly linear to 

 lanceolate, or sometimes lower oblong-lanceolate (and inch broad), all contracted above the 

 somewhat connate bases, sometimes denticulate : heads smaller and more glomerate, 5-8- 

 flowered, commonly uniligulate. — Nov. Gen. & Spec. 33 ; Torr. & Gray, PI. 360. F. ma- 

 ritima, HBK. Nov. Gen. & Spec. iv. 285. F. tPiinifoUa, Nutt. Jour. Acad. Philad. vii. 81. 

 Selloa nudata, Nutt. in Am. Jour. Sci. v. 300 ; therefore Gi/iiinosperma nudatum, DC. Prodr. 

 v. 312. — Coast and Keys of 8. Florida; first coll. by Ware. (Cuba & Bahamas.) 



# # Heads in closer subsessile or short-pedunculate or folicse-involuci-afe chiefly terminal glomer- 

 ules: involucre of mostly 3 bracts, narrow, 3-5-flowered or some only 2-flowered, commonly 

 uniligulate : disk-corollas sparsely hirsute at base. 

 - F. angustifolia, Pers. Erect, a foot or two high : leaves from linear to lanceolate, serru- 

 late or entire, lightly 3-nerved, sessile by broadish or little contracted base : ligule somewhat 

 exceeding the disk. — Syn. ii. 489 ; DC. Prodr. v. C35 ; Gray, PI. Fendl. 88. Milleria aiynsti- 

 folia, Cav. Ic. iii. 12, t. 223. — Alkaline ground, S. W. Texas to E. Colorado aud New 

 Mexico. (Mex.) 



F. CoxTRAYEiuiA, Pers., is S. American, spreading to W. Indies, and possibly to within our 

 borders, has mostly oblong-lanceolate leaves contracted at base and conspicuously 3-nerved, 

 more glomerate heads, and ligule not exceeding the disk or wanting. 



§ 2. Involucre 1-2-flowerecl, of 1 to 3 unequal bracts : heads densely glomer- 

 ate. — Broteroa, DC, corrected from Brotera, Spreng. in Sclirad. Jour. Bot. (1800), 

 ii. 186, t. 5. 



" F. repanda, Lag. 1. c. Divergently branched annual: leaves obovate to oblong-lanceolate 

 with narrowed petiole-like base, strongly 3-nerved, acutely serrate : glomerules of many con- 

 fluent heads, sessile in the forks and involucrate at end of the branches, outermost heads 

 commonly of a single short-ligulate flower. — F. Cordrayerba, Gray, PI. AVright. i. 114, not 

 Pers. Brotera Contraijerha., Spreng. 1. c. B. trinercata, Pers. Syn. ii. 498. B. Sjirctu/eliij 

 Cass. Diet, xxxiv. 304. Nauenbercjia trinervata, AVilld. Spec. iii. 2393. Broteroa trinervata, 

 DC. Prodr. v. 636. — S. W. borders of Texas, Wri(/ht. (Mex., &c.) 



J. 63. POROPH"^LLUM, Vaill. (Hopes, a passage or pore, <f>vXXov, leaf, 

 the foliage or involucre appearing as if punctate on account of the translucent 

 oil-glands.) — Herbaceous or suffrutescent plants (of the warmer parts of America), 

 usually glaucous ; with alternate or opposite vtndivided leaves, and pedunculate 

 heads of yellow or purplish flowers. Oil-glands present in the involucre when 

 wanting in the leaves, in the form of dots or stripes. — L. Ilort. Cliff. 494; 

 Adans. Fam. ii. 122 ; DC. Prodr. v. G47, excl. § 2, 3. Kleiiiia, Jacq. Stirp. Am. 

 215, t. 127, not L. 



# Annual, with brnad crenate-repand leaves on slender petioles: bracts of cylindrical involucre 

 5: corollas purplish, with filiform tube scveial times longer tlian the throat and limb: akenes 

 flliform or slender-fusiform. 



P. macrooephalum, DC. A foot or two high: leaves roundish-nv;il to oblong (or some 

 of the lowest narrower), about the length of the petiole: peduncles enlarged above, cla\ate 

 and fistulous: head inch long: bracts of involucre obtn.sc : akenes much longer th:in the 

 pa],])us. — Prodr. v. 408; Gray, PI. Wright, ii. 93. — Rocky hills and ravines, Arizona, 

 Wriijkt, TImrher, &c. (Mex.) 



