Spiraea latifolia (Aiton) Borkh.

Spiraea latifolia (Ait.) Bor’-h. vr r.
septentrionalis Fernald
Same loc tion as Baldwin 5434. feveral
patches found.
July 21, 1946
Chromosomes: 2n = 54.
J. T. Baldwin Jr. (Margaret Young and
Q. R. Noggle) 5601.
Spiraea latifolia vab. septentrionalis in Virginia.—On
September 9, 1945, in company with Bernice M. Speeae and
Earlene Atchison, the writer collected Spiraea latifolia (Ait.)
Borkh var septentrionalis Fernald on the very top of Hawksbffl
Mountain (elevation of 4049 feet), Page County, Virginia.
There a but dense patch grew in sod among the rocks.
Some of the plants were in flower; others were in fruit.
Specimens are in the Gray Herbarium (Baldwin 6m)- They
were identified by Prof. M. U Fernald, who wrote in a letter of
October 16 1945: “This variety occurs on the Labrador Peninsula
and in Newfoundland and south to the Magdalen Islands and
subalpine and alpine regions of Mt. Katahdin, Maine, and the
White Mountains, New Hampshire, also on Keweenaw Penin-
sula, Michigan. It is distinguished from true 5. latifolia by the
dense cylindric to ovoid panicles, without elongate lower
branches, and the relatively large flowers. It is a nice addition
to the mountain-fiora of northern Virginia.”—J. T. Baldwin, Jb.,
The Blandy Experimental Farm, Boyce, Virginia.
02910296