ENGELMANN — NORTH AM. SPECIES OF JUNCUS. 485 



the leaves or nature of the inflorescence may be. — Flowers 2 

 — 2j lines long ; sepals broad and either obtuse, or, usually, 

 acute or acuminate and even with subulate tips, the inner 

 ones as long as the outer ones, but often more obtusish ; 

 anthers about 1 line (in a large-flowered specimen of var. y 

 even 1\ lines) long, always much longer than the filament; 

 capsule long mucronate, scarcely exceeding the sepals, incom- 

 pletely 3-celled, by the projection of the placentae ; seeds 0.31- 

 0.33 line long, their length being equal to 2 diameters ; 8 or 

 9 ribs visible; reticulation close but distinct; area; smooth or 

 marked with one or two delicate perpendicular lines, and thus 

 similar to the seeds of J. scirpoides, which, however, have fewer 

 ribs. — E. Meyer (1. c.) describes the plant very correctly, but 

 suspecting that the flattened appearance of stem and leaves 

 might be owing to undue pressure in drying, places it with 

 doubt with J. Mostkovii, from which it is widely different. 



Var. a has leaves 1-2 lines wide, as long or longer than 

 the stem ; heads large, about 5 lines in diameter, usually 2 or 

 3 in a cluster, or sometimes as many as 6 or 8 in a short pan- 

 icle. — Leaves of var./3 2 lines wide, shorter than the tall stem; 

 panicle loose-flowered, somewhat erect, sometimes 6 inches in 

 length. Some of the mountain forms collected by Mr. Bo- 

 lander (Yosemite Valley, Cal. St. Surv. 6036, and especially 

 "alpine meadows," 6006, which is only a foot high) have 

 smaller flowers 1£-1§ lines long, and seem to approach closely 

 to J. oxymeris. — Under Hb. n. 97 two forms have been inad- 

 vertently mixed, one the real var. paniculatxis, and the other 

 a tall (2-3 feet high) several-headed form of var. glomeratus. 

 — Var. 7 is a small mountain form, which with its dark heads, 

 large floAvers, and long protruding stigmas, resembles so 

 nearly the smaller forms of J.falcatus, that a close examina- 

 tion only will distinguish them ; leaves £-£ line wide ; heads 

 4-5 lines in diameter, single or two together. 



51. J. ciiLOROCEPHALUs, n. sp. : caulibus (pedalibus sesqui- 

 pedalibus) e rhizomate brevi repente casspitosis erectis et 

 foliis compressis ; capitulis multi-(15-25)floris singulis seu 

 paucis glomeratis spatham membranaceam subajquantibus ; 

 floribus magnis conspicue pedicellatis pallidis ; sepalis oblon- 

 gis obtusis seu exterioribus et rarissime interioribus mucrona- 

 tis requalibus seu interioribus paulo longioribus stamina vix 

 excedentibus ; antheris longe-linearibus filamento multo 

 longioribus; stylo ovario ovato pluries longiore exserto; 

 stigmata rcquante vel iis longiore; capsula ovata obtusa mu- 

 cronata uniloculari sepalis breviore; seminibus ovatis utrum- 

 que apiculatis reticulatis. 



In the higher mountains of California, Hillebrcmd, Cal. St. 

 Surv. 2338 ; dry places on peaks near Mount Dana, 10,000 ft. 

 high, Breicer, Cal. St. Surv. 1804; along the rapid current 



