Hulsea. COMPOSITE. 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, their concave-carinate centre partly 

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

 and with short and obtuse at length connivent teeth ; those of the pistillate flowers 

 unequally 2 - 4-toothed and shorter than their style ; those of the perfect flowers 

 5-toothed. Anthers short. Style-branches short, in the perfect flowers truncate 

 and minutely tufted at the summit. Akenes oblong-turbinate, 4-angled. 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 the corolla. Only 

 one species. 



1. A. pusillus, Hook. & Am. A low glabrous but somewhat glutinous aromatic 

 annual, a span or so high, corymbosely branched above, and with small heads of 

 yellowish flowers terminating the numerous branchlets : 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 

 Chileans, C. Gay, FL Chil. iv. 257, t. 48. 



Around San Diego : probably introduced from Chili, where it is common along the coast. It 

 also inhabits Guadalupe Island, off Lower California. 



73. AMAURIA, Benth. 



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

 lucre hemispherical ; its scales linear, almost equal, in 2 or 3 series, the outer nearly 

 herbaceous, the inner somewhat scarious. Eeceptacle flat, naked. Eays almost 

 entire : disk-corollas narrow, 5-toothed. Style-branches filiform, tipped with a 

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

 Only the following species. 



1. A. rotundifolia, Benth. A somewhat shrubby (?) viscid-pubescent and low 

 plant ; with the leaves opposite or the upper alternate, petioled, orbicular-cordate, 

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

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

 ular-hispid : akenes nearly glabrous. Benth. Bot. Sulph. 32, & Gen. PL ii. 404. 



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

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

 may be looked for in the vicinity of San Diego. 



74. HULSEA, Torr. & Gray. 



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

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

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

 scarious. Eeceptacle flat, naked, somewhat foveolate. Eays linear, entire or 

 minutely 2 - 3-toothed at the tip : disk-corollas narrow and elongated, and with 

 a slender proper tube, 5-toothed. Anthers tipped with an ovate appendage. Style- 

 branches with somewhat dilated rounded tips. Akenes clavate-linear, compressed- 

 quadrangular, black at maturity, villous. Pappus of 4 short and very thin hyaline 

 chaffy scales, which are pointless and nerveless, mostly broad, and lacerate at the sum- 



