Tas. 4540. 
PITCAIRNIA Jacksont. 
Mr. Jackson's Piteairnia. 
Nat. Ord. BRoMELIACER.—HEXANDRIA Monoaynia. 
Gen. Char. (Vide supra, Tas. 4241.) 
PircatRNia Jacksoni ; foliis subulato-ensiformibus carinatis subtus albo-furfu- 
raceis supra medium spinoso-serratis, scapo simplici, pedicellis patentibus 
calycibusque farinosis, sepalis obtusis, corollee curvate petalis lineari- 
oblongis subtortis longitudine staminum intus ‘squamosis squama bifida 
_ serrata, stigmatibus ciliatis. 
This very handsome Pitearrnia was flowered by Mr. Jackson, . 
the eminent nurseryman of Kingston, Surrey, who imported it 
in a very young state, among tufts of Orchideous plants from 
Guatemala. Its nearest affinity is probably with P. bromelia- 
folia (Bot. Mag. t. 824, where the differences will be at once 
apparent) and equally belongs to the division “petalis basi 
squama instructis.” Among them we find no species with 
which this accords, and hence we name it in compliment to 
Mr. Jackson. It is, as may be presumed, a stove-plant, and 
flowers in the summer months, making a striking appearance ~ 
with its copious large scarlet flowers. 
Descr. Root of many tufted fibres. Plant throwing up 
many suckers from the base. Leaves a foot and more long, 
subulato-ensiform, striated, attenuated above and below, upper 
half only spinuloso-serrated, the rest entire, above dark green 
and naked, below clothed with a whitish floccose or pulverulent 
substance. Scape leafy below, pulverulent, bearing an erect 
raceme of handsome scarlet flowers. Pedicels bracteated, ‘stand- 
ing out almost horizontally and, as well as the calyx, pulverulent. 
Calye of three, imbricated, erect sepals, about three-quarters of 
an inch long, red with a yellowish margin. Corolla scarlet, 
nearly three inches long, curved. Petals \inear-oblong, not at 
all spreading, slightly spirally twisted: near the base within is a 
conspicuous, membranous, two-lobed scale, the lobes slightly 
serrated. Stamens as long as the petals. Ovary glabrous, 
OCTOBER IsT, 1850. 
