Hulsea. COMPOSITiE. 385 



72. AMBLYOPAPPUS, Hook. & Am. 



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, 

 aiid 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 equaUing the corolla. — Only 

 one species. 



1. A. pusillus, Hook. & Arn. 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 

 Chilensb, 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 coryiii 

 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 descril^d 

 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 tlisk- 

 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. Pays linear, entire or 

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

 a slender proper tube, 5-toothed. Anthers tipped wdth 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 hyahne 

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



