Rush Family 81 



frequently leaf-bearing ; panicles about 2 cm. long, loosely few- 

 flowered; perianth segments 4-5 ram. long, lanceolate, greenish 

 or slightly tinged with brown. (J. compressus H. B. K.) 

 Habitat similar to the last, and apparently more common. 



+++ Flowers 3 mm. long or less; capsule obovate or subglobose. 



5. J. patens Meyer. Stems rather soft, 0.5-1 m. high ; inner 

 sheaths tipped with a short awn; panicle rather open, about 4 

 cm. long; perianth segments 3 mm. long, often brownish, spread- 

 ing in fruit; stamens 6; capsule subglobose, slightly angled, 

 obtuse, apiculate, equaling or a little shorter than the perianth. 



Canyons of the Santa Monica Mountains, Hasse. 



** Panicle terminal; stems more or less leafy. 

 *- Annuals. 



6. J. bufonius L. Stems usually branching from the base, 

 5-25 cm. high, with fibrous roots; leaves 0.5 mm. wide or less ; 

 flowers mostly solitary and remote upon the spreading branches ; 

 perianth segments lanceolate, greenish, with scarious margins, 

 4-6 mm. long; stamens 6, sometimes 3, 2-3 mm. long; anthers 

 shorter than the filaments; capsule oblong, obtuse, shorter than 

 the perianth. 



Common in the valleys and mountains in moist ground. 



*- *- Perennials. 



** Leaves not knotted. 



7. J. longistylis Torr. Stems several, simple, leafy, 3-5 dm. 

 high ; leaves much shorter than the stems, flat and grass-like, the 

 sheaths with distinct ligules ; heads usually 5-9 in a sparingly 

 branched panicle, exceeding the very short spathe ; few-flowered ; 

 perianth segments greenish, narrowly ovate acuminate; stamens 

 6; seeds oblanceolate, minute, faintly ribbed. 



Frequent on dry ridges in the pine belt of the San Gabriel and San 

 Bernardino Mountains. 



+*+* Leaves knotted by internal transverse partitions. 



8. J. Torreyi Coville. Stems 2-10 dm. high ; rootstocks slen- 

 der, with tuberiform thickenings a few centimeters apart, each 

 supporting a single stem ; stem stout, 1-4-leaved ; blade stout, 



