244 COMPOSITiE. Lindheimera. 



73. LINDHEiMERA, Gray & Engelm. (Ferdinand Lindheimer, the 

 discoverer of this neat pUvnt, now prized in cultivation, and remarkable for its 

 golden yellow rays simulating a 5-petalous flower.) — Proc. Am. Acad. i. 47, 

 Jour. Bost. Nat. Hist. vi. 225, & PI. Lindli. ii. 22,j. Single species. 



L. Texana, Gray & Engi:lm. 1. c. At lengtli 2 feet high from an annual root, hirsute or 

 lii.sj)iil, brandling above, bearing loosely cymose-paniculate usually slender-pedunculate 

 heads : lower leaves spatulate to luueate-ovatc, alternate, coarsely sinuate-dentate ; upper 

 ovate to ovate-lanceolate, witli a broad closely sessile base, acuniiuate, commonly entire, 

 mainly opposite, their edges and also the peduncles usually beset with some small tack- 

 shaped glands: ligules half-inch or more long. — Open woods and bottoms of the upper 

 Guadalupe lliver, &c., Texas, Lindheimer, Wriij/it. 



74. ENGELMANNIA, Torr, & Gray. {George Engelmann, an eminent 

 botanist, died while this volume was printing, Feb. 4, 1884, a^t. 75.) — Torr. & 

 Gray in Nutt. Trans. Am. Phil. Soc. vii. 343, & Fl. ii. 283. Angelandra, Endl. 

 Gen. Suppl. iii. G9. — Single species, in structure nearer to Parthenium than to 

 Silphium. Fl. sunnner. 



E. pinnatifida, Toki;. & Gray, 1. c. A foot or two high from a stout perennial root, 

 roughish-liirsulc or hispid, brandling above, and bearing somewhat paniculatcly disposed 

 heads of goldcn-ycllow flowers on mostly slender naked peduncles : leaves all alternate, 

 deeply pinnatifid ; radical and lower cauline short-petioled and tlieir linear or oblong lobes 

 sometimes sparingly lobulate ; upjjer cauline sessile and with broad base : head about 4 lines 

 high: rays half-inch or more long: akene rough-hispidulous. — Torr. in Marcy Kcp. t. 11 ; 

 Meehan, Nat. Flowers, scr. 2, i. t. 2. E. Texana, Scheele in Linn. xxii. 155. — Prairies and 

 rocky hills, Arkansas and Louisiana to Texas and Arizona. (Adj. Mex.) 



75. PARTHifiNIUM, L. (Ancient name of some plant, from TrapOkvo':, 

 virgin.) — Herbaceous or sutfruticose (all E. American), bitter-aromatic ; with 

 small heads of whitish flowers ; in summer. — Ga^rtn. Fruct. t. 1 G8 ; DC. Prodr. 

 V. 531 ; Torr. & Gray, Fl. ii. 284; Benth. & Hook. Gen. ii. 351. 



§ 1. PartukmXstrum (Nissole), DC. Ligule more or less evident : caules- 

 cent, usually branching, with altt'rnate leaves either dentate or variously lobed or 

 divided : heads corymbosely or paniculately cymose. 



* Herbaceous, with membranaceous once or twice iiinnntifid loaves, and habit oC Ambrosia. 

 P. Hysteropliorus, L. A foot or two high, from an annual root, diffuse, strigosely pubes- 

 cent, soiuetinics also hirsute, generally green: heads in a loose and open naked panicle: 

 cauline leaves of broadly ovate outline, pinnately parted into 5 to 9 mostly narrow again 

 pinnatilid lobes; of the flowering brandies linear or lanceolate and entire or few-lobed: pap- 

 pus of 2 rather large and roundish scales. — Spec. ii. 988; Bot. Mag. t. 2275. Argi/rochoita 

 hipinnatijida, Cav. Ic. iv. 54, t. 378. Villanova bipinnatifida, Ort. ]3ec. iv. 48, t. 6. (P. lo- 

 batitm, Buckley in Proe. Acad. Philad. 1861, 457, should be this, by its "annual root," rather 

 than the following.) — Waste grounds, Florida to Texas, where it may be indigenous, but 

 probably introduced from within the tropics : also an imported ballast-weed as far north as 

 Philadelphia. (Mex., Trop. Am.) 

 P. lyratum. A foot high from a truly perennial root, canescent or cinereous with fine 

 and close sometimes also loose hirsute pubescence, erect : licads corymbosely crowded, more 

 pubescent : leaves of obovate or oblong outline, lyrately pinnatifid, the lobes short and ob- 

 long. — P. Ili/stci-ophorus, var. lip-alum, Gray, Proc. Am. Acad. xvii. 216. — Texas, in the 

 southern and western parts, Berlandicr, Lindheimer, Wright, lievcrchon , «S:c. Equally allied 

 to the preceding species and to the Mexican P. conferium, Gray. (Adj. Mex.) 



* * Fruticose or suiTrutescent, with firmer and more simply lobed leaves. 

 P. incanum, HBK. Decidedly shrubby, 1 to 3 feet liigh, much branched, canescent with 

 fine tomentum : leaves mostly obovate in outline, sinuutely pinnatifid into 3 to 7 oblong or 



