56 THE AMERICAN MIDLAND NATURALIST 



Stem slender, 4-5 dm. high, simple, with minute leaves in 

 three of the upper axils indicating future branching if an extension 

 of the season would permit it. Leaves large, the maximum size 

 being 12x3.5 cm., gradually diminished toward the top, thin, 

 acuminate, sessile, denticulate. I accept as undeniable that the 

 inflorencence has a few heads, though I have not seen them. The 

 type specimen has a solitary head, which is almost sessile, with 

 the disk 1 cm. high and wide. Involucre lax, with 3 rows of linear, 

 white-margined, green-tipped bracts. Rays blue. 



This species, with its leaves resembling an exuberant form of 

 .4. paniculatus, and its head in size and color suggestive of A. 

 salicifolius, was collected by the writer in the foot-hills of the 

 Turtle Mountains, near Dunsieth, Rolette County, September 



3. 191 1- 



1090. Aster Jacobaeus Lunell, sp. nov. 



Caulis gracilis, 4-8 dm. altus, simplicior vel apicem versus 

 ramis paucis brevibus convergentibus, 1-8 cm. longis gaudens, 

 striatus, paene glabratus, apice exepto lineis pilosis f erme obliteratis. 

 Folia tenuia, firmiora, parva, acuminata, sessilia, caulina margi- 

 nibus subtus integris, superne denticulatis vel integris, 2-7 cm. 

 longa, 7-10 mm. lata, ramorum integra, 18mm. longa, 5 mm. 

 lata. Inflorescentia anguste racemosa, 0.5- 3 dm. alta, capitulis 

 infimis solitariis, in axillis foliorum vel sessilibus vel ramis brevibus 

 sustentis, apicem vero versus capitulis 2-6 fere sessilibus vel 

 breviter pedicellatis, unoquoque in axillo folioli sui solitario. 

 Discus capituli 6-8 mm. altus latusque. Involucri serierum trium 

 laxi squamae acutae, apicibus viridibus praeditae. Flores radiati 

 albi vel pallide rubicundi, vel obscure — pallide violaceo-purpurei. 



Stem slender, 4-8 dm. high, quite simple or with a few conver- 

 gent short branches, 1-8 cm. long, toward the top, striate, almost 

 glabrate, the hairy lines quite obliterated except at the upper 

 end. Leaves thin but firm, rather small, acuminate, sessile, on 

 the stem with the lower margin entire and the upper either denti- 

 culate or entire, 2-7 cm. long, 7-10 mm. wide, and on the branches 

 18 mm. long, 5 mm. wide, entire along the margins. Inflorescence 

 narrowly racemose, 0.5-3 dm. high, With the lowest heads solitary, 

 either sessile or on short branches in the leaf-axils, and toward the 

 top on the branches 2-6 heads almost sessile or on short pedicels, 

 each solitary in the axil of its leaflet. Disk of the head 6-8 mm. 

 high and wide. Involucre lax, with three rows' of linear, acute, 



