168 SEVENTEENTH REPORT. 



FarweUii. It is common at Detroit and probably throughout lower 

 Michigan. The typical form is glabrous and glaucous below pu])escent 

 on the upper parts as well as on the under side of the leaves; the flowers 

 are small, a line in length, white, the lanceolate caljTC lobes nearlj- as 

 long as the corolla. 



At Rochester, Oakland Co., there is a form that is glabrous and 

 glaucous throughout. Both of these forms typically have a normal 

 opposite phyllotaxis and the stems, are more or less obtusely four 

 angular. Each has a form that shows a triangular stem with leaves 

 in whorls of three and the glabrous form has also shown a state wherein 

 the leaves are partly alternate, partty opposite, and parth^ subverticil- 

 late. One leaf of the three is occasionally wedge-shaped with a large 

 indenture at the apex as though a wedge-shaped section had been cut 

 out, a transition towards four leaves to a whorl. Some of the branches 

 are divided to the middle, the lower part being triangular A\ith leaves 

 in threes while each of the upper divisions are normal with the normal 

 opposite phyllotaxis. These facts would seem to indicate a coalescense 

 of two stems or plants, the condition knoA^ni as fasciation. In a coal- 

 escense of two plants one might naturally expect a four angular stem 

 with, possibly, an intermediate angle or rib on each side and four leaves 

 in a whorl; but the triangular stems and verticills of three leaves seems 

 to indicate a reduction or suppression of a part of the stem and its 

 accompanying leaf. 



It might, incidentally, be remarked here that if the intensive studies 

 of the American flora continue to be as productive in the future as they 

 have been in the past, then in a ver}- short period our manuals will 

 necessarily be greatly restricted in range if all the forms are to be in- 

 cluded and the manual maintained at a convenient size and within 

 economical limits. Probably the time is not far distant when there will 

 be a manual of botany for each state of the union each of which will 

 include all the knowii forms of the region it covers. Some of the states, 

 not Michigan, however, are already supplied with their local manuals. 

 I have considered preparing such a work but present duties and obliga- 

 tions will not permit. Some one should, however, take up the work 

 and carry it on to an early completion. 



Corylus Americana. Walt. Var. altior N. Var. 



Taller (15 to 18 feet) than the species. The involucre remaining 

 erect over the nut, simulating a tube, the pubescence being generally 

 thinner and shorter, and the glandular setae fewer, rarely absent. 



The fruit is fairly well represented bj^ Plate XIII fig. 9 in the De- 

 partment of Agriculture Bulletin on Nut Culture in the United States, 

 1896. Farwell, No. 2822, July 7, 1912 in swamps at Algonac; No. 



