TYPHACEiE. (CAT-TAIL FAMILY.) 359 



16. J. xiphioides, Meyer. Stems from a thick creeping rootstock, 2 to 

 4 feet high, 2-cdfje(l : leaves usual/ ij broad, the s/teallis without ligules : heads 

 numerous, browuisli, few to maiiy-Howered, in a compouud pauicle: capsule 

 oOloiif/, acute. 



Var. montanus, Eugolm. Lower and leaves narrower: heads few, 

 usually many-flowered. — Trans. St. Louis Acad. ii. 481. From New Mexico 

 to Washington and the Saskatchewan. 



Order 83. TYPIIACE.E. (Cat-tail Family.) 



Marsh or aquatic herbs, with nerved and linear sessile leaves, and 

 monoecious flowers on a spadix or in heads, destitute of proper floral 

 envelopes. Ovary tapering into a style. Fruit nut-like, 1 or 2-seeded. 



1. Typha. Flowers in a long very dense cylindrical spike terminating the stem. 



2. Sparganiiiin. Flowers in separate dense spherical leafy-bracted heads, which are 



scattered along the summit of the stem. 



1. TYPHA, Tourn. Cat-tail Flag, 



Upper part of the spike consisting of stamens only, intermixed with long 

 liairs ; the lower or fertile part consisting of ovaries, surrounded by club- 

 sliaped bristles. Nutlets minute, very long-stalked. — Leaves long, sheathing 

 tlie base of the simple jointless stems. 



1. T. latifolia, L. Leaves flat: staminate and pistillate parts of the 

 spike approximate. — Across the continent. 



2. SPARGANIUM, Tourn. Bur-reed. 



The upper heads consisting of stamens only, with minute scales irregularly 

 interposed ; the lower larger, consisting of numerous sessile pistils, each sur- 

 rounded by 3 to 6 scales. Fruit wedge-shaped or club-shaped. — Stems 

 simple or branching, sheathed below by the base of the linear leaves. 



* Erect, with branched inflorescence of numerous heads: pistil as long as the 



truncate scales: nuts sessile, wedge-shaped , angular : leaves mostly jlat and 

 merelij keeled, the base triangular with concave sides. 



1. S. euryearpum, Engelm. Stems srout, 2 to 4 feet high : fruit many- 

 angled when rij)e, with a broad and depressed summit abruptly tipped in the 

 centre. — From Nevada northward and eastward across the continent. 



* ■» Erect or rarelg floating, icith simple or branched inflorescence of nutnerous 



heads: pistil with conspicuous sttjle longer than the spatulate denticulate 

 scales: nuts attenuated at both ends, with a stalked base, nearly terete: leaves 

 floating or triangular icithflat sides in the lower half 



2. S. simplex, Hudson. Erect, 9 to 15 inches high, slender: inflores- 

 cence sim])le, the lower heads supra-axillary, sessile or pedunded : fruit more 

 or less contracted in the nii(hlle. — Across the continent. Exceedingly vari- 

 able, the following varieties coming within our range: 



