870 COMPOSITAE 



like; heads 3-5 cm. across; involucres 7-8 nim. long, the bracts 14-24 mm. long, 2.5-4 nam. wide; achenes 2.5-3 mm. long. 



nearly equal, herbaceous, linear-lanceolate or the inner row Sept.-Nov. Lowlands; Honshu (centr. distr. and westw.), 



rhombic-lanceolate, acuminate, puberulent; ligulate corollas Shikoku, Kyushu. Korea, Manchuria, China, and Formosa. 



Key to the varieties of H. hispidus 



lA. Pappus of the tubular florets 1-2 mm. long; involucres about 1 cm. across var. leptocladus 



IB. Pappus of the tubular florets 3-4 mm. long; involucres 1.5 cm. across. 



2A. Plant glabrous; stems 1.5 m. long; leaves linear var. kpidzumianus 



2B. Plant more or less hirsute. 



3A. Stems decumbent; radical leaves rather thick, small, spathulate, petiolate; involucral bracts rather thick var. arenarius 



3B. Stems erect, branched var. insularis 



Var. leptocladus (Makino) Kitam. Aster leptocladus Aster arenarius (Kitam.) Nemoto Hamabe-nogiku. 



Makino; H. leptocladus (Makino) Matsum. Yanagi-no- Stems branched from the base, decumbent, ascending, gla- 



GiKU. Stems slender, densely leafy, densely branched at brescent; radical leaves spathulate, nearly glabrous to loosely 

 top, nearly glabrous; median leaves linear, acute, glabrous; hirsute, prominently ciliate, petiolate; heads about 3.5 cm. 

 heads 2.5-3 cm. across; involucres about 1 cm. across; ligulate across; involucres about 7 mm. long. July-Oct. Near sea- 

 corollas about 13 mm. long; achenes obovate, about 3 mm. shores; Honshu (Japan Sea side from Etchu Prov. and 

 long, pubescent. Oct. Lowlands; Shikoku. westw,), Kyushu. 



Var. koidzumianus (Kitam.) Kitam. H. \oidzumianus Var. insularis (Makino) Kitam. Aster insularis Makino; 



Kitam.; Aster \oidzutnianus (Kitam.) Nemoto Buzen-no- H. insularis (Makino) Matsum. Sonare-nogiku. Plant 



GiKU. Plant glabrous; stems much branched, 1.5 m. long, glabrescent; roots fusiform; stems much branched from the 



with slender branches; cauline leaves linear-spa thulate; upper base; leaves glabrous, ciliolate, lustrous; heads 4-4.5 cm. across; 



leaves gradually smaller, linear; heads 3.5-4 cm. across; in- involucres 7-9 mm. long; bracts glabrous, lanceolate, acumi- 



volucres 6.5-7.5 mm. long; achenes about 3 mm. long, hirsute; nate; ligulate corollas about 18 mm. long, 3-3.5 mm. wide; 



pappus of the tubular florets 3-4 mm. long, brownish red. achenes 4-5 mm. long, hirsute. Aug.-Oct. Near seashores; 



Rocks; Kyushu (Yabakei in Buzen). Shikoku. 



Var. arenarius (Kitam.) Kitam. H. arenarius Kitam.; 



21. ERIGERON L. Mukashi-yomogi Zoku 



Annuals or perennials with erect, sometimes branched stems; leaves alternate, narrow, entire or toothed; heads on naked pe- 

 duncles or scapes, ligulate or eligulate, subglobose or tubular-campanulate; involucral bracts equal, in a single series, membra- 

 nous, not definitely imbricate, linear-lanceolate, acuminate, pilose on back; receptacle slighdy convex, alveolate; ligulate florets pis- 

 tillate, fertile, few-seriate, equal, very narrow, blue or white; tubular florets bisexual, the corollas tubular, yellow, ferule; anthers 

 entire at base; style-branches obtuse; achenes flat, ribbed on margin, pilose; pappus-brisdes 1-seriate, simple, slender, scabrous. 

 About 150 species, mostly in temperate regions, a few tropical. 



lA. Limb of ligulate corolla longer than the tubular part, exserted from the pappus, usually prominent. 

 2A. Heads 3-3.5 cm. across, solitary or few on short scapes. 



3A. Radical leaves long-petiolate, elliptic 1. E. miyabeanus 



3B. Radical leaves spathulate-oblong 2. £. thiinbergii 



2B. Heads 2 cm. or less across, many on tall stems. 



4A. Ligulate corollas involute when dry, often becoming indistinct; pistillate florets with capillary corollas present; stems often 



purplish red 3. E. acris 



4B. Ligulate corollas prominent, flat; capillary corollas absent; stems green. 



5A. Inflorescence nodding before anthesis; leaves vivid green, the cauline oblong to broadly oblanceolate, more or less clasping at 



base; ligulate corollas usually pinkish; May to June 4. £. philadelphictis 



5B. Inflorescence erect; leaves pale green, the cauline ovate to ovate-lanceolate, not clasping at base; ligulate corollas white or pur- 

 plish rose; July to October 5. E. anniiiis 



IB. Limb of ligulate corolla shorter than the tubular part, not exserted from the pappus, minute, in a few series, rarely absent. 

 6k. Involucres 4-5 mm. long; receptacle 2-4 mm. across in fruit. 



7A. Involucres about 5 mm. long; cauline leaves linear 6. E. bonariensis 



7B. Involucres about 4 mm. long; cauline leaves narrowly oblanceolate 7. E. sumatrensis 



6B. Involucres 2.5-4 mm. long; receptacle 1.5-2.5 mm. across in fruit 8. E. canadensis 



1. Erigeron miyabeanus Tatew. & Kitam. Aster mi- rounded to obtuse at both ends, sometimes cuneately narrowed 

 yabeanus Tatew. & Kitam. Miyama-nogiku. Plant at base, 3-nerved, coarsely toothed on upper margin, long- 

 densely pubescent with multicellular crisped-hairs; rhizomes petiolate; cauline leaves loosely arranged, small; heads about 

 6-8 mm. in diameter, covered with old petioles, the innovation- 3.5 cm. across, blue-purple, showy; involucres about 1 cm. long, 

 shoots many, short; scapes about 15 cm. long, solitary; radical subglobose, densely pubescent, the bracts 3-seriate, equal, 

 leaves elliptic, the inner 2.5-3.5 cm. long, about 2 cm. wide, broadly linear, acuminate, purplish; ligulate corollas about 13 



