672 NAIADACEZ ZOSTERA 
PHYLIOSPADIX 
stems, long grass-like entire few-nerved leaves and inconspicuous 
flowers on an enclosed spadix, Flowers monoecious, without 
perianth, the single stamens and ovaries arranged alternately in 2 
rows upon the face of a linear-oblong leaf-like sessile spadix en- 
closed in the dilated membranous base ofa leaf. Anther 1-celled, 
sessile; pollen thread-like, Ovary attached near its apex, beaked 
by.a short style with 2 linear deciduous stigmas, with a single 
pendulous orthotropous ovule. Fruit utricular, oblong. Seed 
with subcrustaceous testa. Embryo split longitudinally and en- 
closing the long linear curved plumule. ; 
Z. marina L. Sp. 968. Stems rather fleshy, 1-7 feet long: leaves rib- 
bon-like, obtuse at theapex, I-8 feet long, 2-4 lines wide, with 3-7 principal 
nerves: spadix 1-3 inches long: flowers crowded, usually from 10-20 of each 
kind on the spadix: at anthesis the stigmas are thrust through the opening 
of the spathe and drop off before the anthers of the same spadix open: 
the anthers at maturity work their way out and shed their glutinous stringy 
pollen into the water: seeds cylindric, strongly about 20 ribbed, about 1% 
lines long, truncate at both ends. In bays and streams along the coast, 
Alaska to California and on the Atlantic coast and Europe. 
Z. latifolia Morong, Mem. Torr. Bot. Club, iii, 63. Rootstocks very 
thick: stems stout 2-10 feet long: leaves 2-4 feet long, 3-6 lines wide, the 
broadest 10-13-nerved: spadix 2-3 inches long: fruit 1}g-2 lines long, 
cylindric, with a stra'ght beak as long as itsself and attached to the spadix 
by a short stipe, distinctly 20-25-costate. In bays, Puget Sound to Calif. 
3 PHYLLOSPADIX Hook, Fl. ii, 171. 
Perennial marine herbs with thick rootstocks, slender stems’ 
elongated linear leaves and inconspicuous dioecious flowers on a 
spadix. Staminate flowers of numerous sessile anthers in 2 rows 
crowded upon a apadix. Anthers 1-celled dehiscing by a vertieal 
slit, dorsally attached near the middle: pollen thread-like. Pis- 
tillate flowers of sessile ovaries attached above the base, attenuate 
into a short style. Stigmas 2, capillary. Fruit a coriaceous 
utricle. 
P. Scouleri Hook. l. c. Stems very stout, an inch or two high, bear- 
ing solitary spathes: leaves 2-6 feet long, 1-2 lines wide, 3-nerved, with 
many fine strise between the nerves: spadix appendages on both kinds of 
flowers elliptical, about 6 lines long; fruit broadly flattened, the lobes 
half as broad as the body. On rocks that are exposed at low tide along the 
coast, Oregon to Alaska. 
4 LILASA Humb. & Bonpl. Pl. Ag. i, 221. (1808.) 
Annual acaulescent paludose plants with terete leaves and 
dimorphous flowers sessile among the leaves and in heads on sim- 
ple scapes. “Staminate and pistillate flowers in the same or separ- 
ate heads, without perianth. Stamens solitary. Anthers nearly 
sessile, rounded, 2-celled, subtended by a hyaline bract. Ovaries 
naked,sessile and erect in the axils of the leaves with very long 
styles and in heads on exserted scapes with short styles. 1-celled 
and l-ovuled. Stigma capitate. Fruit coriaceous, ovoid, inde- 
hiscent, compressed and ribbed, the upper narrowly winged, the 
