SUPPLEMENT. 
POLYSTACHYA. To the species described on p. 196, 
Vol. III., the following should now be added: 
P. leonensis (Sierra Leone). /., upper sepals and petals light 
green ; lateral sepals suffused brownish-purple in the lower half ; 
lip white, the lateral lobes suffused behind with light purple, and 
the front lobe, the central keel, and the basal part of lip white- 
mealy. May. Bulbs globose-depressed, }in. across, arranged in 
a string along the creeping rhizome so thickly as to touch each 
other. Sierra Leone, 1888. 
PONTHIEVA. To the species described on p. 198, 
Vol. IL., the following should now be added: 
P. grandiflora (large-flowered). jl. large ; lateral sepals connate 
for nearly all their length, white, blotched green at base ; dorsal 
sepal narrow-lanceolate ; petals halbert-shaped, twisted, yellow, 
striped Indian-red ; lip small, fleshy, red; scape Qin. bigh ; 
raceme eight to ten-flowered. Jl. broad, ovate, acute, dull green, 
hairy. Ecuador. 
POPULUS. To the species and varieties described 
on pp. 200-1, Vol. 1I[., the following should now be added : 
P. Eugenii (Eugene Simon’s). A garden variety of P. monilifera. 
P. monilifera Eugenii (Eugene Simon's). A tree of giant size. 
It ‘carries its limbs and shoots perpendicularly, forming a 
columnar head. It grows faster than other varieties, and is 
well adapted for planting as a solitary tree in parks or in groups, 
soe by roads or streets” (C. Mathieu, in R. G., Dec. 1, 
1887). 
PORTEA TILLANDSIOIDES. The correct name 
of the plant described on p. 30, Vol. I. as #chmea 
Ortgiesti. 
PORTULACA. To the species described on p. 202, 
Vol. III., the following should now be added: 
P. grandiflora Regeli (Regel’s). l. of a peculiar salmon-buft 
tint, with a yellow centre, solitary. 1885. (R. G. 1209.) 
P. somalica (Somali Land). jl. bright yellow, lin. in diameter, 
disposed in terminal clusters of three. J. scattered, terete, 
acuminate. fA. 8in. to 10in. Somali Land, North-east Africa. 
1886. A stove succulent, of botanical interest. 
POTHOS. To the species described on p. 213, 
Vol. III., the following should now be added: 
P. argentea (silvery). J. ovate, acuminate, inequilateral, of 
firm texture; upper surface silvery-grey, with an irregular band 
of deep green extending nearly the whole length of the midrib, 
and an irregular margin of the same colour. Borneo, 1887. 
P. elongata (elongated). J. ovate-elongated, 12in. to 14in. long, 
6in. to 10in. broad, coriaceous, dark, shining green. 1885. This 
is useful for covering walls, &c. Probably a species of Scindapsus. 
P. flexuosa (bent). J. alternate, oblong, with an acuminate, 
deflexed apex, and a few alternate, elongated ribs. Stems 
flattened, rooting. 
P. nigricans (blackish). J. spreading, 5in. to 6in. long, shining 
blackish-green. 1836. An ornamental climber, suitable for 
covering pillars or trellis-work. 
P. nitens (shining). /. ovate, acute, slightly and unequally cordate 
at base, dark, shining bronzy-purplish-green. Stems terete. 
Hastern Archipelago, 1887. 
PRIMULA. Within the last two or three years, a 
considerable impetus has been given to Primula culti- 
vation, and a large number of new and rare species and 
hybrids have been introduced to English gardens. Un- 
doubtedly, the most extensive collection is that of the 
Royal Botanic Gardens, Kew; Mr. D. Dewar—foreman of 
the Herbaceous Department—who has charge of it, has 
kindly prepared the following descriptions, and has cor- 
rected, from personal observation and study of the plants 
in a living state, a number of errors common to Primula 
nomenclature, &c. Those specially interested in Primroses 
should consult the ‘Report of the Primula Conference,” 
forming Vol. VII., No. 2, of the “Journal of the Royal 
Horticultural Society,’ 1886. The most important of 
recent monographs is the excellent one of Dr. Pax, of 
Breslau (1888), entitled ‘‘ Monographische Uebersicht 
iiber die arten der Gattung Primula.” 
P. admontensis (Admont). J., calyx coloured, pubescent ; 
corolla lobes lilac, cordate; scape erect, twice as long as the 
leaves, few-flowered. May. J. spathulate-ovate, dentate-serrate 
on the margins, glandular-pilose. Roots tufted. Styrian Alps, 
1883. A hybrid between P. Auricula and P. Clusiana, found 
on limestone rock with its parents. Syns. P. Churchillii, 
P. Clusiana dentata. 
Vol. LV. 
Primula—continued. 
P. alpina (alpine). /. brilliant violet-purple, large, in a many- 
flowered bunch. May, Jl. broadly spathulate or obovate, slightly 
toothed, covered, as well as the scape, with farina. Grisons. 
A hybrid between P. Auricula and P. viscosa, of great beauty, 
resembling the former in habit and distribution of the flowers. 
It is suitable for either the rock-garden or the flower-border 
Syns. P. intermedia (of gardens), P. rhetica. 
P. amethystina (amethystine). . red-purple, three to six in 
an umbel; lobes entire or emarginate. June. JU. resembling 
those of a Daisy, ovate-oblong; petioles winged, short, at- 
tennated. Prairies, Yun-nan, China. Plant glabrous, slightly 
farinose. 
P. arctotis (bear’s-ear). jl. white or lilac-purple, smaller than 
in P. pubescens (to which this plant is closely allied), densely 
glandular-hairy. /. broadly spathulate-obovate, obtuse, toothed, 
green. 1886. ‘‘A pretty hybrid between P. Auricula and 
P. hirsuta (Kerner).”” (R. G. 1198 B.) 
P. Auricula dolomitica (Dolomite). jl. of a uniform bright 
lemon-yellow, having a cylindrical tube and a broadly funnel- 
shaped limb of obovate, deeply emarginate segments; umbel 
eight to ten-flowered; scape 2in. to din. long, terete, green. 
l. six to eight, broadly oblong, sessile, dull green, minutely 
hairy, forming a basal rosette, the margins white and minutely 
ciliated. Tyrol, 1884. A beautiful, alpine species. 
P. Balbisii (Baldo). /l. shining golden-yellow, large, almost 
scentless ; throat white, hairy. Apriland May. Baldo, and the 
Alps of South Tyrol, Styria, &c. This is distinguished from its 
near ally, P. Awricula, by its smaller, rounder, and more glossy 
leaves, which are entirely free of farina, so conspicuous in this 
section. 
P. bella (pretty). . violet-purple, two or three on a scape, sub- 
sessile, very large. Summer. /. long-petioled, ovate or sub- 
orbiculate. Habit of the Himalayan P. wnijlera, but differing 
in the narrow, deep lobes of the leaves, in the shape of the calyx, 
and in the corolla, which has bifid lobes, the throat being closed 
a whitish hairs. Summit of Mount Tsang-Chan, Yun-nan, 
884. 
P, bellunensis (Belluno). jl. golden-yellow, large, on longish 
scapes, handsome, free. MayandJune. /. broadly oyate, obtuse ; 
veins prominent; margins deeply and evenly serrated or indented, 
densely ciliated; petioles winged. Alps of Belluno. Said to 
be a hybrid between P. Auricula and P, Balbisii. 
P. Berninz (Bernina). /l. rosy-purple, large, very free. April 
and May. J. smaller than in P. viscosa, with slightly crenated 
margins, entirely glandular-hairy, broad-clasping at base. Rocks, 
rich vegetable soil, Alps, growing with its parents. A natural 
hybrid between P. v. hirsuta and P. viscosa, of rare beauty. 
P. biflora (two-flowered). jl. pretty, deep rose, large, produced 
in pairs on short scapes, in great abundance. Spring. Tyrol. 
Habit and appearance of P. minima, but with larger leaves, 
sheathing at base, and distinctly serrated. The whole plant is 
not more than lin. or so in height: a lovely little subject for 
the rockery, exposed. Sandy peatandloam. A hybrid between 
P. Florkeana and P. minima. 
P. blattariformis (Blattaria-formed). fl. lilac, numerous, 
scattered; corolla lobes broadly obcordate ; raceme 8in. to 12in. 
long. J. ovate or obovate, deeply crenate. Yun-nan, A dis- 
tinct and handsome species, clothed with short, papilliform 
hairs. 
P. bracteata (bracted). /l. yellow, large; lobes obcordate, 
emarginate; calyx densely pubescent. March. J. petioled, 
rugose-oblong, obtuse, with attenuated base; petioles long, 
narrowly winged. Rhizome thick and woody, very charac- 
teristic. Shaded clefts of the limestone rocks, Lankong, 
Yun-nan. Related to P. bullata, but differing chiefly in the 
absence of powder, in the shorter pubescence, and in the 
glandular hairs which cover the entire plant (absent in 
P. bullata). 
P. bullata (inflated). fl. golden-yellow, large; tube narrow at 
the throat, but broadening towards the calyx, half as long again 
as the limb; scapes tall, many-flowered. April. 7. petiolate, 
lanceolate, firm, covered underneath with golden dust, reticu- 
lated and slightly inflated above; margins doubly dentate or 
crenate ; petioles winged. Rhizome thick, woody, covered with 
scars above, divided at the base. Calcareous rocks, Yun-nan. 
A very beautiful species, almost entirely covered with golden 
farina. 
P. calliantha (beautiful-flowered). l. intense violet-purple, five 
to ten in an umbel, large ; calyx campanulate, the teeth narrow, 
purplish on the outside; bracts lanceolate, acuminate. June. 
i. oblong or oboyate-oblong; petioles short, winged and 
attenuated. Rhizome short and thick. Shady places under 
Fir-trees on Mount Tsang-Chan, Tali, Yun-nan, A charming 
species, nearly allied to P. secundijlora, differing in its more 
coriaceous leaves, covered underneath with a fine, golden powder, 
and finely crenulate instead of serrulate. 
P. carniolica (Carniola). /l. pale to deep blue, with a silvery- 
white throat; scape 3in. to 4in. high, with from three to ten 
flowers. April and May. 1. 2in. long, ovate-lanceolate, tapering 
to the base, but again broadening at the clasping point, 
glabrous, shining on the upper surface. Rosettes large, loose. 
4G 
