Scrophularinee—Diplacus. 347 
16. DIPLACUS. 
This genus is very near the last, but most of the species 
are woody at the base. The main distinction, however, is in 
the seed-vessel, which opens in valves with the seed-bearing 
placentas attached to them. The name is from dis, double, 
and mdaxvos, a placenta, referring to the separation of the 
placenta into two parts. 
1. D. glutinosus, syn. Mimulus glutindsus.—A robust 
growing perennial from 2 to 3 feet high, with funnel-shaped 
almost regular flowers, orange-coloured in the original variety. 
But since its introduction, about a century since, it has given 
birth to several marked varieties which have been described as 
distinct species. They may be reduced to four principal forms: 
D. aurantiacus, orange-coloured flowers, having the lobes of 
the corolla emarginate; D. puniceus, cinnabar flowers with 
emarginate lobes; D. latifolius, yellow flowers, larger broader 
leaves, and rounded corolla-lobes; and D. grandiflirus, re- 
markable for the unusual development of the limb of the corolla, 
and its deeply bilobate divisions. The colour here is rather 
variable, ranging in every shade from pure white to nankeen 
yellow, uniform, or covered with spots. This species is from 
California, and somewhat tender. 
Sibthorpia Europea is an interesting slender creeping herb 
with minute reniform hairy leaves and solitary axillary flowers. 
It is found here and there in the South and West of England 
and Ireland. This rapidly covers tbe ground in damp shady 
places. 
17. BUDDLEA. 
A large genus of shrubs, herbs, or even small trees. Leaves 
opposite, commonly densely tomentose, especially on. the 
under surface. Flowers small, often tomentose, axillary, spicate, 
capitate, or thyrsoid. Calyx equally 4-toothed. Corolla 
tubular-campanulate, regular; limb spreading, 4-toothed. 
Stamens 4, included. Capsule dehiscing septicidally in two 
valves. About eighty species are known, inhabiting America, 
Africa, and tropical Asia. The genus was named after Buddle, 
an English botanist. This and some of the allied genera are 
now usually referred to Loganidcew, but having overlooked this 
genus there we introduce it in its old place. 
1. B. globisa.—This is a shrubby species, and the only one 
at all common in British gardens. Leaves linear-lanceolate, 
. 
