ey Ca a © aimee oe a in 
AN ENCYCLOPZDIA OF HORTICULTURE. 163 
PLEUBRANTHE. A synonym of Protea (which see). Pleurothallis—continued. 
; P. atropurpurea (dark le lark purple, solita; bud 
( ‘sop etapa Included under Polypodium Zin. long: — oblique, — —— Bp ot — — 
which see). crested in the middle. Z. oblong, — át base, almost 
PLEUROGRAMME. Included ander Mono- — the stem; sheaths ventricose, h. 6in. Jamaica, 1838. 
gramme (which see). 
PLEUROGYNE (from pleuron, a side, and gyne, 
the female organ; referring to the stigmas issuing from 
the side of the seed-vessel). Syn. Lomatogonium. ORD. 
Gentianee. A small genus (three species) of slender, 
annual herbs, natives of the mountains of Eastern and 
Arctic Europe, Asia, and North America. Corolla wheel- 
shaped, fringed at the throat. Leaves opposite. The 
species are probably lost to cultivation. 
PLEUROPETALUM (from: pleuron, a side, and 
petalon, a petal; in allusion to the shape of the corolla). 
Syn. Allochlamys. ORD. Amarantacee. A genus com- 
prising only a couple of species of slightly-branched, 
stove, glabrous shrubs, natives of Mexico, Ecuador, and 
the Galapagos Islands. Flowers greenish, at length red, 
small, disposed in terminal, branched panicles, sessile or 
pedicellate; perianth of equal, oblong, obtuse, concave 
segments ; stamens five to eight, Leaves alternate, rather 
large, membranous, elliptic-lanceolate, long-acuminate, 
entire or with slightly undulated margins, narrowed into 
a rather long petiole. Only one of the species has been 
introduced to our gardens. It requires culture similar to 
Codizum (which see). 
P. costaricense (Costa Rica). (fl. green, at length scarlet, small, 
very numerous, in terminal an axillary, ao corrio much- 
branched panicles, shortly pedicellate ; — ents five. 
Autumn. J, petioled, alternate, 4in. to ptic-lanceo- 
late, acuminate, with the tip often drawn out ; —— even, or 
obscurely undulate. Central America and Mexico, A 
small shrub, with green branches. (B. M. _ SYN. Melano- 
carpum Sprucei. 
(from pleuron, a side, and 
sperma, seed; in allusion to the size of the fruit 
ridges). SYNS. Aulacospermum, Hymenolæna, Physo- 
spermum. ORD. Umbelliferæ. A genus comprising about 
fifteen species of hardy, tall or dwarf, glabrous, biennial 
or perennial herbs; three are natives of mostly Eastern 
Europe and Russian Asia, and the rest are all Hima- 
layan. Flowers white or dark purple; petals obovate or 
cuneate, rather large for ‘the order; bracts of the in- 
volucres and involucels indefinite, sometimes coloured; ' 
umbels compound, many-rayed. Leaves pinnate or pin- 
nately decompound; segments ovate, toothed, incised, or 
cut into narrow lacinis. Only one species calls for 
description here.. It thrives in any common soil, and 
may be readily increased by seeds, or by divisions. 
P, austriacum (Austrian). fl. white; involucre many-leaved. 
Summer, J. bipinnatisect; the segments pinnatifidly cut into 
acute lobes. Stem fistular. A. 2ft. to 3ft. South Europe, 1697. 
Perennial. (A. F. P. 43; J. F. A. 151.) 
PLEUROTHALLIS (from pleuron, a side, and 
thallo, to blossom; in allusion to the inflorescence). 
Syn. Huwmboldtia. Including Centranthera, Rhyncopera, 
and Specklinia. ORD. Orchidee. A vast genus (nearly 
350 species have been described) of stove orchids, of 
variable habit, natives of the West Indies and tropical 
America. Flowers small, sometimes very small, in a 
few species mediocre or rather large, often secund, in 
bundle- flowered racemes; sepals erect, connivent or 
somewhat spreading ; petals shorter or narrower; pollinia 
two; labellnm usually articulated at the base of the 
column. Stems filiform, one-leaved, often sheathed. The 
species have scarcely — ornamental value, but are 
curious and interesting from a botanical point of view. 
A selection from those best known to cultivation is given 
below. They may be grown either in baskets or pans, 
suspended from the roof of a cool house, most of them 
thriving along with the Masdevallias. The small ones, 
such as P. Grobyi, aro bask — to little tafts of 
yist. or to Fern stems, 
n ái 
(B. M. 4164, under name of Masdevallia Jenestrata.) 
P. —— (bird’s-head). fl. green, with yellow petals and lip, 
resembling the beak of a bird. Z, numerous, oblong-lanceolate. 
Brazil, 1871. A pretty little plant, of tufted habit. 
—F (Barber's). fl. few, on a slender peduncle, four or 
Barberiana 
five times as long as the leaves; sepals light ochre, blotched with 
dark purple, aristate, free, cilia ; petals whitish, smaller, ser- 
rate ; lip cuneate, oblong-clavate. i. very small, e lliptical, acute, 
` thick, keeled beneath. Tropical America, 1881. A small but 
pretty orchid. 
P. bicarinata (two-keeled). A. dull greenish-yellow, in a few" 
flowered raceme ; sepals aristate, the upper one bitid and bicari” 
nate; petals oblong, minutely serrulate; lip obovate, fleshy, 
pone Oh ay i. ae sin. as aie a2) broad ; "sheath on stem 1jin- 
long. A. 6in. Brazil 
Py Dilametlata (two-itzed) og —— red, two or three at the 
base of a leaf, minute. Rhizome creeping, bearing numerous 
stems, each ort het E oe SS ligulate, very thick, fleshy 
leaf. paei nt 1870 
* ) fi. Feros cinnabar-red, one to three on 
uncle Gin. Jon nog — washed with greenish purple; lip 
of a paler cinnabar. spathulate-obovate, minutely tridentate 
at the apex. Steins * short. Costa Rica, 1875, Species 
is of — tufted habit. 
P. Grobyi (Groby’s). jl. yellow, streaked with crimson, small, 
about a dozen in a loose, zigzag raceme; sepals costate, acute, 
the upper one bidentate ; — membranous, acute ; lip —— 
oblong, obtuse. 1. obovate, e cece hy a ie forming 
dark green tufts. h. 3in. Brazil, ¢ 3682.) 
P, Lanceana (Lance's). ji. ae crimson at the base inside, 
in a pendulous spike; sepals linear-lańc 
bidentate ; petals te, fim 
aaa broadly oblong. h. 6in. Srna, 831 
P. (proliferous). ji. deep ; sepals sl — 
petals pale, -lanceolate upwards ; lip oval, fimbriate 
at base, A. 6in. Brazil, 1826. “The format : of leaves, in 
place of flowers, which gave rise to the e, occurs 
specific 
occasionally in oa other es” (Lindle: TB Mt. 3261 ; 
ER R 1208. B rad F speci ( y q 
dii Re ymond’s). fl., se 
Reymon: ¢ orange, brown, and 
pubescent, oblong, "he dorsal ones larger; petals two- lhe. ons 
rounded, the other elongated ; lip minute, l. coriaceous, linear- 
lanceolate, obtuse, acuminated, shorter than the stem, h. 6in. 
Venezuela, &c., 1863. (B. i} 
P. saurocephala dizard- ‘hended fl. yellowish-green, chasing 
to light brown, closely dotted wi le inside, disposed in 
s "copa tice eis 6 broad as the u — 
P. 
- erect, imbricated apike. dorsal 
ones. J, 4in. long, one 
s a hang stem pe 1828 cee 1829, (B M. R. 
P.: scapha (it b -white, ‘marked with pu 
ex the lower — are —— dark — 
racemes lax, many- ——— l. ovate, coriaceous vy 
species. (G. on, n, S., XV. 
* frel aka) fl. hyaline, disposed in sub- 
; sepals with mauve- -purple, aristate ; 
i dark chen teers: with basilar, —— horns, aoe an elli 
—— (strap-leaved). fl. in —— 3in. to 4in. — 
nee loose, funnel-sha; Boone aay petals, 
on iva —— — with ple —— d 
resem 0 mes 
—— rant shorter. h. 14 Mexico, te Moser 3897, under 
name of P, picta.) ; 
PLICATE. The same as Plaited (which see). Se 
PLOCAMA (from plokamos, bent hairs; alluding to © 
the pendulous branches). — Bartlingia, Placodium, 
Placoma. ORD. Rubiacee. A monotypic genus. The 
species is a greenhouse, erect shrub, with very slender, 
pendulous branches. A compost of loam and peat is 
most suitable for its culture. It may be increased readily 
by cuttings, —— will root in sand, under a glass. 
P. —— white, minute, axillar and 
Tr cabs with a g eee jobose tube ant a five- 
— -campani — Pac short — — 
a limb of of five —— seven oblong lanceolate, al 
