MICHIGAN ACADEMY OF SCIENCE. 360 



aitrea (J..) Koch or to reconcile the reduction of the former to the latter. 

 Thaspitim aureum Nntt. is exemplified by Nuttall's description, not by the 

 synonym of Pnrsh listed after the description. Nuttall wrote an entirely new 

 and .accurate descrii)tion based upon the species he had before him, not upon 

 Pursh's description. That he quoted Pursh's Smymium auretim as a synonym 

 of his own sr)ecies is due to a mistaken identification and in no wise can 

 separate Nuttall's name from his species which is a true Thaspium. Blake also 

 claims that lliapsia trifoUata L. is the same as the purple flowered Thaspium 

 atropurpureum Nutt. because the specimen in the Clayton herbarium is a 

 purple flowered plant, the Linnaean species being based through the Gronovian 

 reference on the Clayton specimen. The Gronovian description calls for a 

 plant with crenato leaflets ; those of T. atropurpureum. Nutt. are serrate. The 

 purple flowered species can not be typical Thapsia trifoUata L. because it does 

 not answer to the description. Of the yellow-flowered species generally known 

 as Thaspium aureum Nutt. there are two forms, one with serrate leaflets 

 typical of Nuttall's species and one with crenate leaflets which is typical 

 T. trifoliatum (L.) A. Gr. This latter is occasional in southern Michigan. A 

 form with simply ternate stem leaves and cordate radical leaves has often 

 been reported by some as Zisia cordxita (Walt.) D. C. Rockwood, June 16, 

 1918, No. 4952; Ypsilanti, May 19, 1918, No. 4827y2. The Ypsilanti plant has 

 the radical leaves ternate and lower stem leaves biternate. 



Thaspium, trifoliatum var. aureum (Nutt.) Britt. This is the yellow- 

 flowered form with serrate leaflets. Ypsilanti, May 19, 1918, No. 4827 ; Roches- 

 ter, May 28, 1918, No. 4882b. The Thaspium atropurpureum Nutt. Gen. 1, 

 196, 1918, is but a simple flowered form of T. aureum Nutt. and may be known 

 as T. trifoliatum var. aureum f. atropurpureum (Desr.) n. f. I have not seen 

 it from Michigan but it has been reported from various places in the southern 

 section of the State. 



Daucus Carota L. f. roseus n. f. Flowers pale rose. River Rouge, July 

 21, 1916, No. 4339 ; Harris, July 13, 1918, No. 5078. 



POLEMONIACEAE. 



Phlox divaricata L. f. purpurea n. f. Flowers reddish purple. Redford, 

 May 24, 1918, No. 4853 ; Ypsilanti, May 19, 1918, No. 4839. 



P. divaricata L. f. albiflora n. f. Flowers white. Ypsilanti, May 19, 

 1918, No. 4838. 



VERBENACEAE. 

 Verbena hastata L. var. oblongifolia Nutt. Briefly characterized as with 

 the foliage and flowers of V. hastata L., but with the elongated loosely panicled 

 spikes and scattered flowers of V. urticaefolia L. Franklin, Sept. 22, 1918, No. 

 5159, Billington, Farwell, and Gladewitz, 



