624 
PSEUDOTSUGA. To the species and varieties 
described on p. 238, Vol. III., the following should be 
added : 
P. Davidiana (Abbé 
Davidiana. 
P. Douglasii brevifolia (short-leaved).* J. green, polished. 
This somewhat resembles the Silver Firs; it is of pyramidal 
habit and slow growth. 
P. D. glauca pendula (glaucous, Pe 1. dark green. 
Young growth glaucous-tinted. 1895. A tall variety. 
P. D. glaucescens (glaucous). A very glaucous form. 1895. 
Other forms are : denudata (stem very simple), dwmosa (dwarf, 
compact bush), fastigiata (pyramidal), and stricta (dwarf, erect- 
branched). 
P. D. pumila (dwarf).* 
habit. 
P. D. Stairii (Earl Stairs’).* 7. 
gradually changing to pale green. 
form, less vigorous than the type. 
PSIDIUM. To the species described on p. 239, 
Vol. III., the following should be added : 
P. aromaticum is a form of P. Guajava. 
P. Guajava is the correct rendering of P. Guava. 
P. montanum (mountain-loving). The correct name of 
P. cordatum. 
P. Passeanum (Passe’s). /l. white, axillary. fr. pale green or 
yellowish, pear-shaped, about as large as a Plum, edible. 
1. opposite, ovate-lanceolate, acuminate, borne on short 
petioles. Stems slender, round. h. 3ft. to 6ft. Habitat not 
recorded, 1890. Shrub. (R. H. 1890, p. 233, f. 71.) 
PSILA ROSH. See Carrot Grubs. 
PSILOTUM. P. mascarenica and P. nudum are 
practically identical with P. triquetrum. 
PSILURA DISPAR. See Black Arches Moth. 
David's). A synonym of Keteleeria 
A distinct variety, of neat, compact 
nearly white in spring, 
A showy, free-growing 
PSITTACOSCHENUS. A synonym of Gahnia 
(which see). 
PSORALEA. P. arborea is now regarded as merely 
a form of P. pinnata. 
PSYCHECHILUS. A synonym of Zeuxina (which 
see). 
PSYCHOTRIA. To the species described on p. 239, 
Vol, III., the following shonld be added. Several plants 
formerly classed hereunder are now referred to Pali- 
courea. 
P. cyanocarpa 
P. eyanococea. 
P. leucocephala (white-headed). 
macrophylla. 
P. pilosa (pilose). 
P. racemosa (racemose). 
racemosa, 
P. sulphurea (sulphur-coloured).* /l. bright blue, Centranthus- 
like, borne in clusters. jr. sulphur-yellow. JZ. shining green. 
Fiji, 1887. A profuse and continuous flowering, small, climbing 
shrub, 
P. tabacifolia (Tobacco-leaved). fl. gin. long, shortly pedi- 
cellate ; calyx pubescent, the lobes triangular; corolla pale 
yellow, tomentose, tubular, the lobes short, triangular, margined 
red; thyrse terminal or from one of the upper axils, 4in. to 7in. 
long, contracted. September. 7. opposite, 5in. to Yin. long, 
Zin. to 3in. broad, elliptic-lanceolate or oblong, acuminate, 
rather membranous. Brazil. Syns. Palicowrea discolor (of 
gardens), Palicowrea nicotiancefolia (B. M. 7001). 
PSYLLA MALI. 
PSYLLA PYRISUGA. See Pear—Insects. 
PTERIDOPHYLLUM (from Pieris, a Fern, and 
phyllon, a leaf; the leaves are like Fern-fronds). Orb. 
Papaveracee. A small genus (two species) of herbs, with 
rather thick rhizomes, natives of Japan, and very closely 
allied to Hypecowm. Flowers in a simple or slightly- 
branched, terminal raceme: sepals two, scale-like; petals 
four, spreading, the outer ones elliptic-concave, the 
inner ones flat; scape naked. Leaves radical, pectinately 
pinnatisect. P. zeylanicwm was introduced some thirty 
years ago, but it does not appear now to be in cultivation. 
(blue-fruited). The correct name _ of 
A synonym of Rudgea 
The correct name of P. chontalensis. 
The correct name of Palicourea 
See Apple-Sucker. 
THE DICTIONARY 
OF GARDENING, 
PTERIS. Pterises are not fastidions as regards soil : 
and a mixture of two parts peat, one part loam, and one 
part sand suits most of them. The majority of them thrive 
as well in a place exposed to strong light as in a shady 
one, bat this does not apply to the beautifully-variegated 
P. quadriaurita argyrea, P. cretica albo-lineata, P. asperi- 
caulis tricolor, and P. ensiformis Victoriz, all of which, 
either in their natural habitats or under cultivation, 
need a subdued light. The cause of these plants being 
frequently met with in a stunted condition and having 
a burnt appearance is generally attributable to the effects 
of strong light, and this is readily understood when we 
consider the natural conditions under which the plants 
flourish, being always found in the dense shade of forests 
where the annual rainfall is very heavy, and rarely if 
ever growing in Bamboo forests where the shade is 
partial only. 
With the exception of a few species provided with 
creeping rhizomes, and which may be propagated by 
division, all Pterises are readily increased from spores, 
which are abundantly produced and germinate very freely. 
The Bracken can rarely be grown successfully in pots 
for a long time; but it forms a noble ornament when 
planted in a deep, sandy soil, where the development of 
its fleshy rhizomes is not interfered with. In such a 
position it should be covered with old leaves every 
winter, or with its own if these are not required for 
other purposes. Its propagation takes place nacurally 
by means of the spores, for it requires special care in 
transplanting, and can only be successfully moved when 
dormant in winter, 
Although P. e. Victorie reproduces itself very freely from 
spores, some of the seedlings are thoroughly distinct. 
Among these we may particularly note regine, which 
has the variegation running in narrow stripes to the 
margins of the leaflets, and is of more vigorous growth 
than Victorie ; and cristata, a form with very prettily 
and regularly crested fronds, which are also beautifully 
and distinctly variegated. 
P. palmata possesses the peculiarity of reproducing 
itself from bulbils borne at the top of the stalk, just at 
the point of junction with the leafy portion. The quickest 
way of propagating it in quantities is by means of 
spores, which are freely produced ; ‘yet the bulbils will, 
if pegged down on the ground without being severed 
from the parent plant, make young plants in a very short 
time. 
To the species and yarieties described on pp. 240-5, 
Vol. III., the following should be added. Except where 
otherwise indicated, stove treatment is required. 
P. adiantifolia (Adiantum-fronded). 
adiantoides. 
P. adiantoides (Adiantum-like). 
adiantoides. 
P. Bausei (Bause’s). A variety of P. semipinnata. 
P. biaurita argentea (silvery).* fronds deep shining green, 
with the bases of the pinnules greyish or whitish-green. 
1894. A useful plant. . 
P. Boultoni (Boulton’s). A form of P. serrulata showing a 
very distinct colour, this being a light pea-green. 
P. Childsii (Childs’). fronds compound; pinnze much sub- 
divided, ‘‘the tips and margins being percristate.” Origin not 
stated. 1896. Greenhouse. 
P. comans densa (dense). fronds spreading round an erect 
caudex. New Caledonia, 1880. 
P. crassipes (thick-stalked). A synonym of P. gigantea. 
P. cretica crispata (crisped). fronds beautifully crisped, 
bold, spreading, green, with a sin. band of glaucous-grey down 
the centre. 1891. 
P. c. Mayii (May’s).* fronds variegated as in P. c. albo-lineata, 
but the plant is smaller, and all the pian, whether barren 
or fertile, are crested. This form reproduces true from spores. 
P. c. nobilis (noble).* fronds erect, beautifully crested. 1888, 
A dwarf variety. 
P. c. sempervirens (evergreen).* A handsome crested variety, 
exceedingly useful for room decoration. 
P. ec. Summersi (Summers's). fronds much divided, having 
all the principal pinne heavily divided and erested at apex. 
1898. ‘This is described as ‘ta particularly fine Pteris, of 
sturdy but elegant growth.” (G. C. 1898, xxiii., p. 370, f. 139.) 
P. c. Wimsetti (Wimsett’s).* fronds from lft. to 2ft. long, 
chestnut-striped ; pinnz variable. 
P. Drinkwateri (Drinkwater’s).* fronds 2ft. high; pinne dark 
green, jin. wide. 1896, A beautiful Fern for the conservatory. 
A synonym of Pella 
A synonym of Pellea 
