256 COilPOSIT.E. Tetracjonotheca. 



or sometimes wanting : stems more branching : involucre ovoid and less angled 

 in the bud. — Halea, Torr. & Gray, 1. c. 



- T. Texana, Gray & Exgelm. Minutely pubescent or glalirate : stems slender, a foot or 

 two high, sometimes freely branched : cauline leaves laciniately ]iinnatifid or incised, 2 or 3 

 inches long; the lower tapering into margined connate petioles; upper with winged petioles 

 or bases dilated at insertion and usually connate around the stem into u, toothed disk : pe- 

 duncles elongated (4 to 9 inches long) : lobes of the involucre and 7 to 9 rays half-inch long : 

 tube of the corollas glandular : pappus none, or very minute, or sometimes of numerous 

 subulate squamella; of length nearly equalling the breadth of the akene. — Proc. Am. Acad. 

 i. 48. Halea Texana, Gray, PI. Pendl. 83, & PI, Lindh. ii. 227. Tetrofjonosperyna lijrnti/b- 

 lium, Scheele in Linn. xxii. 167. — Eocky ground, Texas, Lindheimer, Wric/ht, &c. (Adj. 

 Mex., BerlanfUer, Palmer.) 

 T. Ludoviciana, Gray. Glabrous or nearly so : stem rather stout, 2 to 4 feet high, usu- 

 ally leafy to the top : leaves ovate or oblong, ample (the larger 4 to 7 inches long), saliently 

 and acutely dentate, the lowest on winged petioles, upper all connate by mostly broad bases 

 into a large perfoliate disk : peduncles mostly longer than the leaves : corollas with tube 

 somewhat pubescent: ligules 10 to 12, oval, less than half-inch long: akenes (over 2 lines 

 long) crowned with a conspicuous pappus of rigid oval or oblong chaffy scales in length 

 equalling the breadth of the truncate summit. — E. Hall, List PL Tex. 13, no. 328. Halea 

 Ludociciana, Torr. & Gray, 1. c. — Sandy soil, Louisiana (Hale, Leucemcorih) & Texas. 



Var. repanda. Depauperate or dwarf form ; flowering sometimes from near the 

 ground ; the leaves therefore petioled, and the upper with perfoliate disk of united bases of 

 the petioles, nearly as in T. Texana: peduncles elongated as in that species; so that it is as 

 it were intermediate between the two. — Halea repanda, Buckley in Proc. Acad. Philad. 

 1861, 458. — Texas, near Corpus Christi, Buckleij. W. of San Antonio, Palmer; an au- 

 tumnal state, flowering as seedlings. 



88. SCLEROCARPUS, Jacq. (SkA^jpos, hard, Kap-n-o^, fruit, referring 

 to the indurating enclosing bracts.) — Strigose-pubescent herbs (the original spe- 

 cies African, the others mostly Blexican) ; with brandling stems, terminal pedun- 

 culate heads of yellow flowers, and alternate or opposite leaves : fl. summer. — Act. 

 Helv. ix. 34, t. 2, & Ic. Ear. t. 17G; Benth. & Hook. Gen. ii. 364. Aldama, 

 Llav. & Lex. Xov. Gen. Descr. i. 14. Gymnopsis, DC. Prodr. v. 561, in part. 



S. uniserialis, Bexth. & Hook. 1. c. Annual, a foot or two high, loo.sely branched: 

 leaves all alternate, slender-petioled, deltoid- or rhombic-ovate, or uppermost lanceolate, 

 coarsely dentate, the strigose pubescence of the lower face canescent : loose involucral bracts 

 nearly in a single series; corollas orange; ligules 5 to 9, oval or oldong : fructiferous bracts 

 cartilaginous or buny, terete, roughish, in age often tuberculate. — (J^mjiops/s uniserialis. 

 Hook. Ic. t. 145 ; Torr. & Gr.ay, Fl. ii. 316; Pevue Hort. 1S53, t. 14; Belg. Horticole, 1854, 

 t. 20. Aldama uniserialis, Gray, PL Lindh. ii. 228. — Moist or shady ground, Texas, Ber- 

 landier, Drummond, &e. (Mex.) 



89. ECLlPTA, L. (Name from IkX^ttw, to be deficient, i. e. in pappus.) 

 — Insignificant herbs, of the warmer regions, chiefly of shores; with opposite 

 leaves, and scattered small heads of whitish or yellowish flowers ; in summer — 

 Mant. Alt. 157; DC. Prodr. v. 480. 



"•B. alba, Hasskabl. Annual, 1 to 3 feet high, or often procumbent and smaller minutely 

 slrigose-puiiescent: leaves lanceolate or oblong, sparinglv serrate, sessile or the lower some- 

 what pet.oled: peduncles from the upper axils, sometimes equalling the leaves, sometimes 

 shorter than the hea.ls : ligules not surpassing the disk, white : akenes of the disk at length 

 corky-iiiargmcd, truncate at summit cir 4-denticulate when vouiig. — PI ,Tav Par j-"^ E 

 erecta & E. ,,r„slrata, L. Mant. Alt. 286. E. procumhens & e'. braclu/noda, Michx. Fl. ii. 

 129 E. spe^es 1-8, DC. 1. c. Cnda alba, L. Syst , & TV,7„.,,/„„ alba,'}.. Spec. Ennatorio- 

 ,Marn.„, Dill. Elth. 1. 113. Amelias Carolin,an„s, \\'alt. Car. 313. - Shores and river-banks, 

 ^ew .Jersey to Texas. (All subtropical countries.) 



