868 TWENTY-FIRST REPORT. 



No. 5001. Widely distributed in southern Michijian. The small leaved form 

 has leaves about y> as lar«e, about 1% to :'. inches long and the same in width, 

 round, ovate and more generally obliquely cordate, style pubescent at base, 

 peduncle glabrous but bract usually more or less stellate pubescent, pedicels 

 stellate pubescent and cyme branches more or less so. This may be known 

 as T. Americana var. scabra f. micropiiyi.la. n. f. Frequent at Rochester 

 and vicinity, July 13, 1918, No. 50G2, and Oct. 28, 1917, No. 4803. Large leaves 

 on succors may be over a foot in diameter. 



CORNICULATACEAE. 

 Epilobimn oUganthuvi Mx. (E. lineare var. oliganthum (Mx.) Trelease). 

 The typical, low, simple, few-flowered form with opposite, linear leaves I 

 have not seen in Michigan. The common form here is the common form of the 

 species with linear, strongly revolute leaves, frequently revolute clear to the 

 midvein, densely bushy-branched above, forming a compact top especially 

 during the fruiting season. This is the E. lineare Muhl. Cat. 39, 1813; E. 

 rosmarinifolium Pursh Fl. I, 259, 1814 ; E. leptophyllum Raf. and E. densum 

 Raf. Desv, Jour. Bot. II, p. 271, 1814 ; E. squamatum Nutt. Gen. I, 250, 1818 ; 

 E. paluslre var. albescens Richards. Frankl. Journ. 12, 1823 ; E. palnstre var. 

 albifl(yrmn Lehm. in Hook. Fl. Bor. Amer. I, 207, 1833 ; and E. palustre var. 

 lineare A. Gr. Man., 130,1856. It may be known as E. oliganthum var. 

 ALBESCENS ( Richards. ) n . comb. In swamps near Bloomfield, Sept. 8, 1918, 

 No. 5102. Another farm, somewhaf taller, (about 2 feet high,) much more 

 slender and divaricately branched forming a broad, open top has lanceolate 

 flat leaves, (primary, l%-2 lines wide) margin barely recurved and may be 

 known as Epilobium oliganthum var. gracile n. var. Swamps near Bloom- 

 field, Sept. 8, 1918, No. 5103. 



UMBELLATACEAE. 



Thaspium trifoliatum (L.) A. Gr. In Rliodora for March, 1918, Mr. S. F. 

 Blake, in a discussion of this species and the Clayton Herbarium, makes the 

 statement that Nuttall's Thnnpium aureum is ultimately based upon the 

 ^myrnium aureum L. and consequently Nuttall's name must be considered 

 as a synonym of Zizia aurea (L.) Koch. In making this statement Mr. Blake 

 is making Nuttall say what he never intended to say, what he never did say, 

 and probably what he never thought of saying. The conclusion of Blake would 

 be a legitimate one if Nuttall had proposed the species on synonyms alone, as, 

 for instance, has been done in Vol. V of the Memoir of the Torrey Botanical 

 Club for a large number of new combinations. But Nuttall gave a fairly accu- 

 rate description of his species, so accurate, indeed, that it will tax the ingenuity 

 of the most expertly critical of modern American botanists to discover any 

 resemblance in the fruit of T. aureum as described by Nuttall to that of Zizia 



