96 PROCEEDINGS OP THE AMERICAN ACADEMY 



* * Caules spithamsei ad sesquipedales e radice bienni vel subperenni, 

 majores ramosi oligo— polycephali : liguliE parum exsertae vel in- 

 clustE. 



•hr PurpurejE : corollae eligiilatfe filiformes numerosoe. 



E. ACRis, L. — Anticosti and Labrador to the Rocky Mountains, 

 south to Colorado and Utah, and to the northwest coast. 



Var. Drcebachensis, Blytt, Norg. Fl. 561, Glaber vel subglaber; 

 involucro nudo vel basi tantum hirsuto; ligulis ant subexsertis aut 

 minutis filiformibus pappo etiam per anthesin brevioribus. £. elonga- 

 tus, Ledeb. FL Alt, jE. Kamtschaticus, DC. Prodr, E. glabratus, Hook. 

 Fl. Bor.-Am. ii. 18, maxima parte, non Hoppe. — Same distribution, 

 and numerous intermediate forms. 



H— H— AlbidiE, filiformes : flores interiores eligulatae hand visas ! 

 E. ARMERi^FOLius, Turcz. E. lonchophyllus & E. glahratus var. 

 minor, Hook. E. racemosus^ Nutt. — Saskatchewan and along the 

 Rocky Mountains to Colorado, the Wahsatch, and the Sierra Nevada. 



§ 3. C^NOTUS, Nutt. Flores foerainei uniformes numerosi ; ligulis 

 inconspicuis semper tubo suo brevioribus, aut parum exsertis stjlum 

 vix superantibus, aut minimis etiam obsoletis : flores disci stepius 

 pauci, corolla quadridentata : herbce annuae et biennes, microcephala^. 

 (Transitus ad Conyzam.) 



* Floccoso-lanatae, incanae, nee viscida vel hirta : pappus simplex. 



E. ERiOPHYLLUS, Gray, PI. Wright, ii. 77. — S. Arizona, 

 * * Leviter arachnoideae, mox nudatae, pube subviscida, 



E. SUBDECURRENS, Schultz Bip. Conyza suhdecurrens, DC. Prodr. 

 V. 379. C. Coulteri, Rothrock in Wheeler Rep. vi. 155, non Gray. — 

 S. Arizona on Mt. Graham, Rothrock. Mexico, recently collected by 

 Schaffner, Parry, and Palmer. 



* * * Pube nee lanata nee viscida hirsutte vel hispidte : caules folio- 



sissimi. 

 -I— Inquilinae, involucro cinereo-pubescente. 

 E. LiNiFOLius, Willd. E. ambiguus, Schultz Bip. in Phy(. Canar. 

 E. Bonariensis, DC. pro parte. Conyza ambigiia, DC, C. sinuata, 

 Ell. — Waste grounds, coast of S. Carolina to Florida. 



-1- -)- Indigenas, microcephalae, involucro fere glabro. 



E. Canadensis, L, — Everywhere common, now a cosmopolite weed. 

 E. divaricatus, Michx. — River-banks of the Mississippi and its 

 tributaries, to Texas. 



