1918] Blake,— Notes on the Clayton Herbarium 65 
NOTES ON THE CLAYTON HERBARIUM. 
S. F. BLAKE. 
(Continued from p. 54.) 
9. Convolvulus panduratus L. Sp. i. 153 (1753)! The Clayton 
specimen (no. 641), on which the Gronovian reference is based, has 
the leaves pubescent beneath, glabrous calyx, stem, and petioles, and 
glabrous 1-3-flowered peduncles. The name IPOMOEA PANDURATA 
(L.) G. F. W. Meyer, Prim. Fl. Esseq. 100 (1818), must be restricted 
to this form with leaves pubescent beneath. The equally common 
and widely distributed form with leaves glabrous beneath should bear 
the name I. panpurata (L.) G. F. W. Mey. var. RUBESCENS Chois. 
in DC. Prod. ix. 381 (1845). 
10. Gratiola virginiana L. Sp. i. 17 (1753).2 In the Linnaean 
Herbarium are five sheets of this species. One sheet, from Kalm, 
is the G. virginiana of all our manuals. Another, with no data, is the 
same plant, and a third, likewise without data, is probably identical. 
A fourth, from India, is a very different and unidentified species, while 
the fifth is a mixture of Ammania and “ Gratiola trifida Willd.” All 
these specimens, however, are nomenclatorially of no consequence 
in this connection. The Linnaean species, as a reference to the sub- 
joined description will show, is based primarily on the Gronovian 
reference, which in turn rests on Clayton 379. This plant, in the 
British Museum, is the short-peduncled G. sphaerocarpa Ell. Sk. i. 14 
(1816), and the name G. viraintANA L. must be taken up for this 
species. ° 
The long-peduncled plant which has passed for G. virginiana or 
G. virginica for a century and a half must now be called GRATIOLA 
NEGLECTA Torr. Cat. Pl. N. Y. 10, 89 (1819). The earlier name 
1 Convolvulus panduratus. 
“4, CONVOLVULUS foliis cordatis integris panduriformibusque, calycibus laevibus. 
“ Convolvulus foliis inferioribus cordatis, superioribus trilobis, calycibus pedunculis petio- 
lisque glabris, caule rubescente. Gron. virg. 141. 
“ Habitat in Virginiae arenosis.” 
2 Gratiola virginiana. 
“3. GRATIOLA foliis lanceolatis obtusis sabdentatis. Gron. virg. 6.* 
“* Habitat in Virginia.” 
(In Addenda, Sp. ii. 1200 (1753). “P. 17. Gratiola virginiana (adde) Tsieria Manga Nari. 
Rheed. mal. 9. p. 165. t. 85.” 
