AROIDEE (Brown). 33 
out a style, and with an entire or lobed stigma, one—many-celled, with 
axile, parietal, basal or apical placentation ; ovules 1—many in a cell, 
orthotropous, campylotropous or anatropous. Fruit a 1-many- 
seeded berry, Seeds albuminous or exalbuminous. 
Herbs or shrubs, with a thick fleshy or tuberous rootstock, or with erect, 
eeping, or climbing stems, simple or branched; leaves alte rnate, radical or 
wai usually Me sheathing petioles, net- or parallel-veined ; spa athe open to 
the base or the si conv volute or tubular, wholly deciduous or persistent, 
or big the biter ak per . 
ISTRIB. Genera ab aan Species about 1000, mers ree in the 
Tropies of both hemispheres, very few in the temperate re 
Tribe 1, PistrEm. Female part of spadix adnate re a spathe. Flowers 
unisexua 
I. Pistia. ok floating aquatic herb. Leaves in a small flattened rosette, cuneate- 
oblon 
Tribe 2 , StYLOCHITONER. Spadin _ without an appendix, Flowers 
Ree hiner erie annular or cup-shaped 
IT. Sty ton. Aeris spa con herbs. So hastate, sagittate, or lanceolate. 
loc 
Spathe eet r bel 
Tribe 3, PHILODENDRER, Spadia free, without an appendix. Flowers 
unisexual, witheot a pet anth, Ovaries surrounded with staminodes or naked. 
III. Richardia. ag wating herbs. Leaves hastate, sagittate, or lanceolate. 
Spathe convolute bel 
I, PISTIA, Linn. 
Spathe ge tubular below ; limb open, ae constricted on 
eac h side s base. Spadix ‘shorter than the spathe, moncecious, 
form in outline with the sides Hans inwards or ditniens Flowers 
unisexua one. Female inflorescence of a single ovary, 
apparently arising from the back of the spathe, very oblique, 
ry 
l-celled ; style obliquely erect from the top of the ovary ; stigma 
capitate ; ovules numerous, iar orthotropous. Male inflorescen 
branous outer. and inner skin, ia 
between them; embryo minute, es 
A floating, Faniraaigest a ae herb, with a werk of fibrous roots; leaves in a 
rosette, with flabellate raised beneath; spathes axillary, with very short 
peduncles, 
Distris, A single species, variable in the form of its leaves, found deci pie 
the tropical and subtropical regions of the globe, in still, fresh water 
1. P. Stratiotes (Linn. Sp. Pl. 963); leaves sessile in a rosette, 
gx = eee 1-2 in. broad, euneate-obovate, notched or entire at the 
