Calystegia sepium (L.) R.Br.

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FLORA OF THE U.S.A.
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WEST VIRGINIA, Pendleton County. 11.5 km
SW of Franklin on rte. 220, 4 km NE of Cave; grassy
roadside bank in agricultural valley; 3 8°33 V2 N,
79°26' W.
Climbing grasses to 80cm; bracteoles strongly keeled
and saccate with overlapping margins; corolla whiter
R.K. Brummitt 20731	1 July 2002
EX HERB. HORT. BOT. REG. KEW.
THIS MATERIAL IS RESTRICTED. IT IS SUBJECT TO THE RBG KEW
TERMS AND CONDITIONS UNDER WHICH IT WAS SUPPLIED.
20731, 2073 8, 20739 and 20740. Calystegia sepium
cf. subsp. appalachiana Brummitt. These four
collections were all made in similar grassy roadside
habitats within 30 km on the same road, one in WVa
and three in Va, two very close together. In their
habit climbing up grass stems to about lm, in their
strongly saccate and overlapping bracteoles, and in
their general leaf shape (including sinus) they all
looked very similar. However, 20731 had an almost
white corolla with just a faint pink tinge near the
margin, but drying pink; 20738 was similar to 20731;
20739 (growing just 15 yards from 20738) had a
clear bright pink corolla, exactly right for my concept
of subsp. appalachiana; and 20740 had a corolla light
pink all over. They appeared to be one taxon with
variable corolla colour, which I found very
surprising. 20731 has a fairly hairy stem, especially
near the apex, while 20740 has rather more speading
and angled lobes than the others such as is very
typical of subsp. appalachiana. One starts to
wonder about hybridisation (C. catesbeiana ???), but
there was no direct evidence for this. R.K.B.
03502352