Huhea. COMPOSITE. 385 



72. AMBLYOPAPPUS, Hook. & Am. 



Head several-flowered, heteroganious 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 Ling 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. & Am. in Hook. Jour. Hot. iii. 321. Aromia tenui/olia, Xutt. Infantea 

 C/n'/i'iisix, (.'. (Jay, Fl. (,'hil iv. 257, t. 4S. 



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-llowered, 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. Pays 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, IVntli. A somewhal shrubby (!) viseid-puheseent and low 

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

 ineisely toothed or lobed : heads (about half an inch in diameter) loosely coryin- 

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

 ular-hispid: akenes nearly glabrous. — Benth. IJot. Sulpli. 32, A < '.en. l'l. ii. 104. 



San Quontin, Lower California, lat. 80° 21', Hinds. Known only by the specimen dcscrilied 

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

 in 1 1 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 inneriuos! more 



SCarious. Receptacle flat, naked, somewhat foveolate. Hays 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 I ahorl and very thin hyaline 

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



