186 THE DICTIONARY 
OF GARDENING, 
Polygonum—continued. 
ones sub-cordate at the base, upper ones truncate, all with 
glaucous and prominently-veined under-surfaces. Stem erect, 
strong. h. 10ft. to 12ft. Sachalin Islands, 1869. A strong-grow- 
ing, hardy perennial, differing — from P. cuspidatum in its 
angular, striated stems. This plant luxuriates in a moist subsoil 
near the margin of water, and is a desirable subject for naturalising 
in semi-wild places. See Fig. 228, (B. M. 6540 
P, Sieboldii (Siebold’s). A garden synonym of P. cuspidatum. 
P. spherostac’ (round-spiked).* fl, blood-red, pendulous, 
in a broad, cylindric, globose spike. Autumn. J. 3in. to din. long, 
linear, linear-oblong, or lanceolate, acute, crispidate erenulate, 
glabrous and glaucous or pubescent beneath; radical ones 
stalked, cauline ones sessile. Alpine and sub-alpine Himalaya. 
Hardy. (B. M. 6847.) 
P, tomentosum (tomentose). f clear rosy-pink, in erect, spike- 
formed —— at the tips of the branches. J. large, oblong- 
Janceolate, very much attenuated at the apex, covered on bot 
surfaces, but especially beneath, with greyish hairs. India, 
1876. A half-hardy or greenhouse perennial. (R. G. 810.) 
P. vaccinifolium (Whortleberry-leaved).* fl. bright rose, freely 
oduced in long, nearly round spikes. Late summer and autumn. 
. smooth, ovate or elliptic, attenuated at both ends, the margin 
pafo ber —— bright green, sometimes tinged with red above, 
e ben Stems much-branching, woody, prostrate. - 
ya, 1845, A hardy perennial, one of the most useful plants for 
rockwork in cultivation. (B. M. 4622.) 
POLYMNIA (dedicated to the muse Polyhymnia, 
for no obvious reason, the species being coarse and 
inelegant). Leaf-cup. ORD. Composite. A genus com- 
prising about a dozen species of greenhouse or hardy, 
glabrous, scabrous-pubescent or villous, often slightly 
viscid, perennial herbs, shrubs, or trees, natives of 
America, from Bonaria to Canada. Flower-heads yellow 
or yellowish, heterogamous, rather large, mediocre, or 
small, corymbosely paniculate; achenes glabrous; in- 
volucre hemispherical or expanded, with two-seriate 
P. canadensis (Canadian). /.-heads whitish-yellow, small ; rays 
P, edulis (edible). f.-heads yellow. A tall, coarse-growing, hardy 
P. grandis (large). A synonym of Montanoa bipinnatifida. 
P. heracleifolia (Heracleum-leaved): 
P. dalis (pyramidal). jl.-heads having a yellow ray and 
see). 
tinct. 
upwards of 450 species. 
Fronds lift. — Sit. 
| entire fertile pinna, 
Polymnia—continued. 
few, obovate or wedge-shaped, shorter than the involucre, July. 
l, lower ones deeply pinnatifid, the uppermost ones triangular- 
ovate, and three to five-lobed or angled, petioled. A. 6ft, North 
America, 1768. Hardy herbaceous perennial. 
perennial, cultivated in the Andean region for the sake of its 
edible tubers. See Fig. 229. 
A synonym of Montanoa 
bipinnatifida. 
a k brown disk, disposed in cymes. Summer and autumn, 
l. cordate-ovate, 12in. long by 16in. broad, with decurrent petioles. 
h. 10ft. A free and rapid-growing, half-hardy, arborescent 
perennial, thing like the Sunflower in habit. New 
Grenada, 1867. (R. H. 1867, 210.) 
. Uvedalia (Uvedalia). /l.-heads yellow; rays ten to fifteen, 
linear-oblong, much longer than the inner scales of the involucre; 
outer involucral scales very large. September. J. broadly ovate, 
angled and toothed, nearly sessile ; lower ones palmately lobed 
abruptly narrowed into a winged petiole. h. 4ft. to 10ft. United 
States, 1699. Hardy herbaceous perennial. 
POLYPARA. A synonym of Houttuynia (which 
POLYPETALOUS. Having petals perfectly dis- 
POLYPHEMA. A synonym of Artocarpus. 
POLYPODIUM (the old Greek name, used by Theo- 
phrastus, from polys, many, and podion, a little foot; on 
account of the appearance of the rhizome and its append- 
ages). Polypody. Including Aglaomorpha, Calymmodon, 
Campyloneuron, Colysis, Craspedaria, Cryptosorus, Cyrto- 
miphlebium, Dibblemma, Dictymia, Dictyopteris, Drynaria, 
Dryostachyuwm, Goniophlebium, Goniopteris, Grammitis 
(in part), Lecanopteris, Lepicystis, Lopholepis, Micro- 
gramme, Microsorium (in part), Monachosorum, Nipho- 
bolus, Niphopsis, Paragramma, Phegopteris, Phlebodium, 
Phymatodes, Pleopeltis, Pleuridiwm, Polycampium, Pseuda- 
thyriwm, and some other less important so-called genera. 
Orp. Filices. The largest genus of the order, comprising 
I It includes plants of two 
different modes of growth, each series comprising a num- 
ber of species of each of the different kinds of venation, 
and from all climates. Sori on the back of the lobes, 
round or rarely oblong, not more than twice as long as 
broad. Polypodinms are very handsome plants; they 
thrive under very varied conditions. Many of them, per- 
haps, do best in good fibrous loam and soil rich in humus; 
others thrive on blocks of fibry peat, on tree-fern stems, 
or treated as basket-plants. Some of them are eminently 
adapted for crevices on rockwork. Except where other- 
wise stated, the species described below thrive under — 
stove treatment. For general culture, &c., see Ferns. _ 
P, acrostichoides (Acrostichum-li i e-creep- · 
ee E a ree | 
rowed below, naked above, dirty-y —— — 
Rapp tree ns eee a nee ar Ste 
— rt of the frond. Ceylon, Queensland, &c. 
P. adnascens (adnascent). rhiz. slender, firm, with linear, de- 
iphobolus acrostichoides. 
naked a à 
small, immersed, occupying the whole of thy Cak. er 
part of the frond. India, e, 1824 SYN. Niphobolus adnascens 
adhering). sti. 6in. to 12in. long, s) 
a caine, Cara : 
several similar ne 
adnate to the rachis at 
six between the MAAN sae Gian A 
P. ppo punctatissimum (much dotted with white). a 
