36 THE AMERICAN MIDLAND NAtURALlST 



Analytical Ki:v. 



A. Stem leaves petioled, achenes 15 striate A'. Jacobaea 



A. Stem leaves sessile. 



a) Achenes m-striate, shorter than the pappus A'. Hitchcockii 



a) Achenes 20-striate, almost as Long as the pappus K. reticulata 



1011. Kuhnia Hitchcockii A. Nels. Bot. Gaz. 31. 403. (1901). 

 On the Capitol grounds and on the plains of the Missouri 



at Bismarck, Burleigh Co. 



10 1 2. Kuhnia reticulata A. Nels. 1. e. 403. 

 Minot; Fargo (CI. Waldron). 



1013. Kuhnia Jacobaea Lunell, sp. nov. 



Caulis robustus, rninutitn pulverulentus, de basi ad apicem 

 versus ramosus. Folia eaulina ovata, 4-5 em. longa, 2-2.5 cm. lata, 

 acute et inaequaliter serrata, versus basim abiupte contracta, 

 petiolis alatis 3-5tnm. longis; ramorutn anguste lanceolata, 2-3 

 em. longa, integra, sessilia. Cymi eongeste corymbosi, panieulatos 

 fieri inch nati. Involucra cylindriea, 10mm. alta. Aehenia 5-5.5 

 mm. longa, 15-striata. Pappus dense plumosus, albus, 7 mm. altus. 



Stem stout, minutely puberulent, branching from the base 

 up. vStem leaves ovate, 4-5 cm. long, 2-2.5 cm. wide, sharply and 

 unevenly serrate, abruptly contracted toward the base, with winged 

 petioles, 3-5 mm. long; those of the branches 2-3 cm. long, narrowly 

 lnaceolate, entire, sessile. Cymes congested corgmbose, with a 

 tendency for becoming paniculate. Involucres cylindrical, 10 mm. 

 high. Achenes 5-55 mm. long, 15 striate. Pappus thickly plumose', 

 white, 7 mm. high. 



Besides through other features, this species is easily distin- 

 guished from others by its large, petioled stem leaves. The type 

 specimen was collected by the writer on August 24, 19 13, along 

 James River at Jamestown, Stutsman County. 



LACINIARIA Hill, Veg. Syst. 4: 49, pi. 46. (1762). Liatris 

 Schreb. Gen. PI. 542. ( 1 791 ). 



Analytical KEY. 



A. Bracts of the cylindric or oblong involucre ovate to oblong, 

 acuminate to cuspidate, with straight tips; pappas bristles very 

 plumose. 

 B. Heads 3-6-flowered, usually of equal size; spike dense, 



strongly leafy-bracted below 1. L. punctata 



B. Heads 15-60-flowered, sum- enlarged; spike interrupted 

 below, either not leafy or inconspicuously bracted, 

 C. Some heads enlarged 2 or 3 times 2. L fallacior sp. nov. 



