SCHEUCHZERIACEAE. 29 



pistillate flowers of sessile carpels in two vertical rows on the 

 face of a broadly linear sessile spadix enclosed in a boat-shaped 

 spathe. 



Leaves 2-2.5 mm. wide; spathes solitary or rarely two. P. scouleri. 



Leaves 1-1.5 mm. wide; spathes several, on short lateral peduncles. P. torreyi. 



Phyllospadix scouleri Hook. Stems stout, 2-5 cm. long, bearing a single 

 spathe; leaves strongly 3-nerved, 1-2 m. long, 2-5 cm. broad. 



On rocky seacoasts, Vancouver Island, British Columbia to California. 

 First found at the mouth of the Columbia River by Scolder. 



Phyllospadix torreyi Wats. Stems slender, bearing one or two axillary 

 peduncles at each joint; leaves narrow, 2 mm. wide, 1-nervcd or faintly 3- 

 ners^ed, often a meter or more long. 



Vancouver Island to California, on rocky shores. 



Family 13. SCHEUCHZERIACEAE. Arrow Grass 



Family. 



Swamp plants with narrow leaves and terminal racemose or 



spike-like inflorescences; flowers perfect or unisexual, naked or 



with a usually evanescent bract-like perianth; stamens 2 or 3; 



carpels 3-6, each 1-2-ovuled, more or less united till maturity, 



dehiscent or indehiscent. 



Leaves all basal; flowers numerous, in spikes or 



racemes, on scapes. 42. Triglochix, 29. 



Stem leafy; flowers few, in a loose raceme. 43. Scheuchzeria, 29. 



42. TRIGLOCHIN. Arrow Grass. 



Flowers small, perfect, in a terminal spike-like raceme borne 

 on a naked scape; perianth segments 3-6, greenish, evanescent; 

 stamens 3-6; anthers 2-celled, on very short filaments; carpels 

 3-6, united into a compound pistil; ovules solitary; capsule, 

 when ripe, splitting into 3-6 carpels with a persistent central 

 axis. 



Triglochin maritlma L. Scapes subterete, 20-40 cm. high, exceeding the 

 leaves; leaves thickish, narrow; raceme elongate, 15-40 cm. long; fruit ovoid, 

 angled, 5-6 mm. long; carpels usually 6, sometimes 3. 



Common in marshes along the seashore. 



43. SCHEUCHZERIA. 



Rush-like bog perennials with creeping rootstocks and erect 

 leafly stems; flowers small, in racemes; perianth 6-parted, 

 regular, in two series. 



Scheuchzeria palustris L. Stems flexuous, 15-20 cm. high, exceeded by the 

 leaves; raceme loose, few-flowered; bracts sheathing; carpels ovoid, divergent 

 in fruit. 



In sphagnum bogs, widespread but infrequent. Near Seattle, Piper; 

 Tacoma, Flett. 



