Stenotheca. — Sect XXXVI. Accipitrinella; n. 535 — 530. — Sect. XXXVII. Thyrsoidea. 1125 



cida, reliquti I ü - 35 valde sensim decrescenlia, inferiora oblonga vel oblongo-lanceo- 

 lata (ad 10 : 2,5 cm), in petiolum ± late alatum ± dense pilosum attenuata acutius- 

 cula, media oblongo- vel sublanceolata utrinque attenuata sessilia acutiora epilosa vel 

 margine costaque dorsali parce brevissime ciliata, summa anguste lanceolata vel linearia 

 integerrima longe acuta. Involucra minuta pauci(c. 12 — 25)-flora, initio anguste, 

 matura ovato-cylindrica, (4 — )5 — 7 mm longa epilosa haud vel basi tantum vix parce 

 Iloccosa haud vel disperse vel densiuscule et minute glandulosa, squamis zb angustis 

 obtusiusculis vel partim acutis (longioribus c. 6 — 8!) obscure vel atro-viridibus late pallide 

 marginatis. Achaenia 2,5 mm atra columnaria. Ligulae minutae. Styli atri. 



In offenen, trockenen Wäldern von Kanada, Neu-England und Ohio bis Georgia 

 und Alabama, z. B. Kanada! Massachusetts: N.-Easton!, Brookline!, W. Roxbury! 

 Vermont! New-York! Pennsylvania: Pocono!, Tuscarora (Poeppig)!, Phila- 

 delphia! Maryland! Washington! N. -Jersey: Glifton in Passaic Co. (Nash)! Dela- 

 ware: Wilmington (Sch.-Bip. Cich. suppl. III. ed. Hohenacker n. 171)! Virginia: 

 Whiteville!, Arlington! Ohio: Cleveland (Krebs n. 173!, 297). N.-Carolina (Bey- 

 rich)! Georgia (Buchtey)! — Juli — September. 



Variat glandulis ubique nullis vel in involucro tantum dispersis vel in involucris 

 pedicellisque superne evolutis vel etiam in ramorum apicem descendentibus. 



Nota. Cfr. sectionem Accipitriniformia. 



Sect. XXXVII. Thyrsoidea. 



Thyrsoidea Fr. Epicr. (1862) I 53 ; Peter in Engler-Prantl, Pflzfam. IV. 5. 387. — Stirps 

 H. longipili Fr. 1. c. — Echioracium Sch.-Bip. in Bonpl. IX. (1861) 174 et in Flora 

 J862) 439. — Phyllopoda, hypo- (saepe pseudo-) vel aphyllopoda, polycephala. Folia 

 caulina 10 — 20 plerumque ±: lanceolata, interdum latiora vel ± oblonga, omnia prae- 

 sertim margine minute subglandulosa et cum caulis parte inferiore vel etiam superiore 

 ubique pilis longissimis hirsutissima. Caulis firmus, anthela dense thyrsoidea, dein 

 paniculala, divaricata. Involucra (6 — )7 — 9( — 1 0) mm haud vel canofloccosa haud vel 

 densissime pilosa dense vel densissime et minute vel micro-(rarissime sparsim) glan- 

 dulosa. Ligulae breves vel saepius subexsertae luteae apice glabrae. Styli plerumque 

 fusciduli, rarius lutei. Achaenia 2,5 — 3,5 mm fusco-atra, rarissime straminea, columnaria 

 vel sursum vel deorsum parum attenuata, pappo sordido vel albescente. — Cfr. p. 1077. 



Pazifisches Nordamerika. — Fig. 78. 



Conspectus specierum. 



A. Achaenia fuscoatra vel atra. Involucra epilosa vel sub- 

 (rarissime dense) pilosa plerumque dense glandulosa. Styli 

 fere semper livescentes vel fusci. 



a. Folia ubique efloccosa (raro summa caulina in costa 

 dorsali parcefloccosa). 

 ct. Styli ± lutei. (Achaenia 3,5 mm). 



I. Involucra et anthela dense vel modice microglan- 



dulosa. Caulis vel tota planta hirsutissimus . 537. H. Scouleri. 



538. H. longiberbe. 

 II. Involucra parce microglandulosa tantum. Caulis 



glaber 539. H. Babcockii. 



ß. Styli livescentes vel fusci. 



I. Glandulae in anthela involucrisque minutae vel 

 minutissimae. 



1. Achaenia 2,5 — 3,5 mm. Involucra et anthela 

 haud vel parce pilosa. 

 * Achaenia 3,5 mm. Caulis glaberrimus. 

 f Ligulae breves stylosae. Rami 1 — 3- 



cephali 540. Ä chelannense. 



