672 NAIADACE.E ZOSTEKA 



PHYLI.OSPAD1X 



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 of a 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 the apex, 1-8 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 pnd shed their glutinous stringy 

 pollen into the water: seeds cylindric, strongly about 20 ribbed, about 1% 

 lines lone, truncate at both ends. In bays and streams along the coast, 

 Alaska to California and on the Atlantic coast and Europe. 



/. 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^-2 lines long, 

 cylindric, with a stratght 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 vertical 

 slit, dorsally attached near the middle: pollen thread-like. Pis- 

 tillate flowers of sessile ovaries attached above 1 the base, attenuate 

 into a short style. Stigmas 2, capillary. Fruit a coriaceous 

 utricle. 



P. Sconleri Hook. 1. 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 striae 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 LIL.fi A 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 1-ovuled. Stigma capitate. Fruit coriaceous, ovoid, inde- 

 hiscent, compressed and ribbed, the upper narrowly winged, the 



