Hulsea. C0MP0SITJ5. 385 



72. AMBLYOPAPPUS, Hook. & Arn. 

 Head several-flowered, heterogamous but discoid, 4 or 5 marginal flowers pistil- 

 late ; the 10 or 12 others perfect ; all fertile. Involucre of 4 to 6 oval or obovate 

 thin-herbaceous equal scales, as long as the disk, tlieir concave-carinate centre partly 

 embracing ray-akenes. Ileceptaclo small, conical. Corollas all very short, tubular, 

 and with short and obtuse at longtli connivent tooth ; those of the pistillate flowers 

 unoipially 2-4-toothod and shorlor than tlio.ii' etylo; thoHO of tho porfoct Howoi-a 

 T) toothod. Antliora short. Stylo-branchoa short, in tho porfoct liowoi-e truneato 

 and minutely tuftod at tho summit. Akoncs oblong-turbinato, 4-nnglod. Pappus 

 of 8 to 12 equal oblong blunt and nerveless chaffy scales, which are opaque and 

 thickened at base, much shorter than the akene, about equalling tho corolla. — Only 

 one species. 



1. A. pusillus, Hook. & Arn. A low glabrous but somewliat glutinous aromatic 

 annual, a si)an or so high, corymbosely branched above, and with small heads of 

 yellowish flowers terminating the numerous branchlots : leaves alternate or the 

 lower opposite, narrowly linear, mostly simple and entire, some pinnately 3-5-parted. 

 — Hook. & Arn. in Hook. Jour. Bot. iii. 321. Aromia tenuifolia, Nutt. Infantea 

 Chilensis, C. Gay, Fl. Chil. iv. 257, t. 48. 



Around Saii Diego : probably introduced from riiili, where it is coniniou along tho const. It 

 also Inhabits Guadalupe Island, off Lower California. 



73. AMAURIA, Iknth. 

 Head many-flowered, with numerous pistillate rays ; all the flowers fertile. Invo- 

 lucre hemispherical ; its scales linear, almost ctpial, in 2 or 3 scries, the outer nearly 

 herbaceous, the inner somewhat scarious. licceptacle flat, naked. Kays almost 

 entire : disk-corollas narrow, 5-toothcd. Style-branches niif(jrm, tipped with a 

 short-subulate acute appendage. Akenes linear, 4-iingled, destitute of pappus. — 

 Only the following species. 



1. A. rotundlfolia, Bonth. A somowhat .shrubby (]) viscid-pubcwiont and low 

 plant ; witli the leaves opposite or the upper alternate, petiolcd, orljicular-cordata, 

 incisely toothed or lobed : heads (about half an inch in diameter) loosely corym- 

 bose : corollas yellow, those of the disk and tlie tube of the (about 20) rays gland- 

 ular-hispid : akenes nearly glabrous. — Benth. Bot. Sulph. 32, it Oen. PI. ii. 404. 



San Quentin, Lower California, lat. 30° 21', Hinds. Known oidy by the specimen described 

 by IJentham. The habitat is so near tho southern boundary of the .State that this obscure plant 

 may be looked for in the vicinity of San Diego. 



74. HULSEA, Torr. k Cray. 



Head many-flowered, with numerous narrow pistillate rays and very many disk- 

 flowers ; all fertile. Involucre hemispherical or broader, of narrow and lax sorae- 

 Avhat equal scales in 2 or 3 series, the outermost herbaceous, the innermost more 

 scarious. Receptacle flat, naked, somewhat foveolate. liays linear, entire or 

 minutely 2-3-toothed at the ti|) : disk-corollas narrow atid (>longa(od, and with 

 a slender proper tube, .^-toothcMl. Atithers tipi)ed with an ovale appendage. Slylo- 

 hmnehoH witli Romowhat dilated rounded tips. Akenes clnvatediiioar, cnmpreKHCMl- 

 (piatlrangular, black at maturity, villous. Pappus of 4 short and very thin hyaliue 

 chaffy scales, which are pointless and nerveless, mostly l)road, and laceiate at the sum- 



