ELISHA MITCHELL SCIENTIFIC SOCIEY. 53 
Robinia dubia Fouc.’ and the other names included in its 
Synonomy refer toa plant which has long been cultivated 
in Kurope, and which, if not a hybrid’ between /?. Pseud- 
acacia and Ff. viscosa, is a garden variety of 7. viscosa. 
It is separated from the plant under consideration no less 
by its stout spines, than by the presence on its twigs and 
pods of the viscid secretion so characteristic of véscosa. 
Since Pursh’s name rosea is excluded by the previous 
use of it by Marshall and du Monceau for P. hispida, and 
no other has been published, I propose the name Loyr- 
tonit, complimentary to Mr. F. . Boynton of Biltmore, N. 
C., an observer having a most extensive acquaintance 
with the southern Appalachian flora. 
The proposed species is characterized as follows: 
Robinia Boyntonit, sp. nov. | 
Robinia hispida var rosea Pursh, Fl. Amer. Sept. 
2:488. 
Robinia rosea D. ©. Prod. 2:262. 
Robinia hispida (in part) Gray, Man. Fifth ed. 131. 
Mature twigs 3-4mm thick, terete, a bright varnished 
brown, glabrous; stipules minute, awl-shaped, 
caducous; shoot of the season at first minutely pubescent, 
at length glabrous or nearly so. Leaves 10-16cm long, 
leaflets 9-13, mostly placed alternately, short-stalked, 
oblong or oblong-ovate, 2-4cm long, 1-2cm wide, tipped 
with a slender mucro. Petiole and leaflets minutely pu- 
bescent when young, soon glabrous. LRacemes axillary, 
erect or nodding, 7-9cm long, one-half to two-thirds the 
length of the leaves, rather loosely 8-12 flowered. Flowers 
on slender, erect or spreading pedicels 4-5mm long, rose- 
purple, pink, or purple and pink on the outer portion, 
white or much paler towards their base, when expanded 
5In Desv. Journ. Bot. 4: 204. 
6 London (Trees and Shrubs Brit. 236) stated that it is a hybrid which 
originated in 1730. 
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