RUBIACES. SILVA OF NORTH AMERICA. 107 
PINCKNEYA. 
FLowERrs perfect; calyx-limb 5-lobed, the lobes unequal, sometimes developed into 
colored petaloid leaf-like bodies; corolla gamopetalous, 5-lobed, the lobes valvate in 
estivation ; stamens, 5; ovary inferior, 2-celled; ovules numerous, horizontal. Fruit 
a many-seeded 2-celled capsule. Leaves opposite, entire, petiolate, stipulate, deciduous. 
Pinckneya, Michaux, Fl. Bor.-Am. i. 103 (1803). — End- Hooker, Gen. ii. 47. — Baillon, Hist. Pl. vii. 472 (excl. 
licher, Gen. 554.— Meisner, Gen. 158.— Bentham & Pogonopus). 
A small tree, with fibrous roots, scaly hight brown bitter bark, resinous buds, stout terete pithy 
branchlets coated while young with hoary tomentum, ultimately glabrous and marked with scattered 
minute white lenticels and large nearly orbicular or obcordate leaf-scars displaying a lunate row of 
numerous crowded fibro-vascular bundle-scars. Terminal buds ovate, terete, contracted above the middle 
into slender points, covered with the dark red-brown lanceolate-acute stipules of the last pair of leaves 
of the previous year often persistent on the base of the growing shoots and marked at the base with two 
broadly ovate pale scar-like shghtly pilose elevations; axillary buds obtuse, minute, and nearly immersed 
in the bark. Leaves opposite, complanate in vernation, oblong-oval or ovate, acute at the apex, wedge- 
shaped at the base, and gradually narrowed into long stout petioles, entire, membranaceous, coated at first 
with pale pubescence, at maturity dark green and puberulous on the upper surface, paler and puberulous 
on the lower surface, especially along the stout midribs and primary veins, deciduous ; stipules interpe- 
tiolar, conspicuously glandular-punctate at the base on the inner face, inclosing the leaf in the bud, 
triangular, subulate, pink, becoming oblong, acute, scarious, ight brown, caducous. Flowers in pedun- 
culate terminal and axillary pubescent trichotomous few-flowered cymes. Bracts and bractlets linear- 
lanceolate, acute, at first pink, becoming scarious, deciduous, or the bracts sometimes enlarged, and 
rose-colored. Flower-buds sulcate, coated with thick pale tomentum. Calyx-tube clavate, bracteolate 
at the base, covered with hoary tomentum, not closed in the bud ; calyx-limb five-lobed, the lobes decid- 
uous, subulate-lanceolate, green tinged with pink, scarious, or in the central flower of the ultimate 
division of the cyme with one or rarely with two produced into oval or ovate acute petaloid rose-colored 
puberulous membranaceous leaf-like bodies. Corolla salver-formed, light yellow, cinereo-tomentose, with 
a long narrow tube somewhat enlarged in the throat, five-lobed, the lobes oblong-obtuse, marked with 
red lines and pilose with long white hairs on the inner surface, recurved after anthesis. Stamens five, 
exserted ; filaments filiform, free, inserted opposite the lobes of the calyx on the tube of the corolla 
below the middle; anthers oblong, emarginate, attached on the back below the middle, introrse, two- 
celled, the cells opening longitudinally. Disk epigynous, fleshy, annular, depressed in the centre. 
Ovary two-celled; style filiform, exserted, slightly enlarged, two-lobed and stigmatic at the apex ; 
ovules numerous, inserted in two ranks on a thin two-lipped placenta longitudinally adnate to the inner 
face of the cell, anatropous; raphe ventral; micropyle superior. Fruit a subglobose obscurely two- 
lobed two-celled many-seeded capsule, loculicidally two-valved, the valves thin and papery, light brown, 
puberulous especially at the base, faintly rayed and marked with oblong pale spots and with the scars 
left. by the falling of the deciduous calyx-limb and style, sometimes tardily septicidally two-parted to 
the middle, persistent on the branches during winter, the valves finally falling from the woody axis; 
epicarp very thin, brittle, separable from the slightly thicker tough woody endocarp. Seeds horizontal, 
two ranked, minute, compressed ; testa thin, light brown, reticulate-veined, produced into a broad thin 
