Mr Don ow Azalea^ Rhododendron, Ledum and Leiophylhm. 49 
RHODODENDRON.— Jms. 
Azalea sp omnes (praeter A. procumhentem) L. Juss. Calyx 
profunde 5-paititus, persistens. Corolla campanulata vel infun- 
dibuliformis (in panels rotata) : limbo 5-lobo : lobis latis, planis, 
aequalibus rarius inaequalibus. Stamina 5-^10, declinata, in disco 
hypogyno inserta, saepius corolla miilto longiora ; filamenta 
gracilia, basi hirsuta : antherse oblongae, apice foraminibus ge- 
minis aperientes. Plstlllum 1 : stylus simplex, declinatus, sta- 
minibus longior : stigma capitatum, saepius emarginatum. Cap- 
sula oblonga, cylindracea, 5-sulca, 54ocularis, 5-valvis, apice 
dehiscens : valvis lineari-oblongis : marginibus introflexis, ap- 
proximatis. Columella tetragona. Semina oo , compressa, sco- 
biformia, ala membranacea cincta. 
Fructlces rarius arbores, ramosissimi, rigidi, sempervirentes 
vel decidui. Folia alterna, integerrima, in aliis coriacea, in aliis 
mendbranacea, nunc glaberrima nunc hirsuta. Flores Qxi plurl- 
hus magni) pedunculati, purpurei, coccinei, rosei vel albi, in aliis 
aurei vel crocei, in corymbis subspicatis, terminalibus dispositi, 
rarius solitarii aut laterales. Per hyems flores futuri in hyber- 
naculo squamis numerosis dense imbricato strobilem mentiente 
inclusi. 
The genus Rhodora differs from Rhododeyidron in the ano- 
malous structure of its corolla, which is separated into three pe- 
tals, slightly united at the base ; the upper one is thrice broader 
than the two lower ones, is 3-lobed, and resembles the half of 
the corolla of a Rhododend^'on : the two lower ones are spread- 
ing, and have the form of ordinary petals. This singular struc- 
ture of corolla, proves the correctness of M. De Candolle’s in- 
genious hypothesis, regarding the cohesion of petals in monope- 
talous corollas 
I doubt much, if the figure of the corolla, unattended by any 
Other difference in structure, is to be considered alone sufficient, 
in this order, to constitute a generic division. Indeed Rhodora 
is so intimatel)! allied to Rhododendron, that it may hereafter be 
* Theorie Elementaire de la Botanique, p. 112. 
VOL. VI. NO 11. JANUAEY 18^2. 
1 ) 
