Wiecanp: Some Notes on Juncus 447 
drawn showed sepals slightly longer than the capsule, but this now 
appears to be not at all constant. The range of /. iu¢erior is there- 
fore extended into New Mexico and Arizona. 
From Arizona and New Mexico other specimens have been re- 
ceived, however, which seem to be quite distinct not only from 
J. Arizonicus but also from all other hitherto described species. 
It seems best to present these here’ as follows: 
Juncus Neo-Mexicanus sp. nov. 
Perennial, 20-50 cm. high, rigid and erect, rather pale green 
and strongly striate: leaves in well grown plants half the length 
of the culm or less, flat, moderately narrow (0.5-1.75 mm. wide) ; 
sheaths loose, the margins membranous but scarcely scarious, 
tapering above to the auricles which are membranous and scarcely 
at all produced: inflorescence small, 2-8 cm. long, usually green 
even in fruit, not congested, the branches erect; bracts 2~3, at 
least one much longer than the inflorescence ; bracteoles apicu- 
late: flowers green, rather large; sepals 4-5 mm. long, rigid, 
pungent, strongly spreading, the membranous margins very nar- 
row, all nearly similar ; stamens 6, about one half the length of the 
perianth, anthers short: capsule conspicuously ovate, thick-walled, 
about 3—} shorter than the perianth; placentae not reaching to 
the axis ; mature seeds not seen. 
Arizona and New Mexico. Arizona— Huachuca (£. Palmer, 
no. 4614, 1890, type, Nat. Herb.), Cedar Springs, ‘growing 
abundantly in cool water of spring and outlet” (/. W. Toumey, 
no. 513, July, 1892); Grand Cafion, Yavapai Co. (4. O. Wooton, 
no. 1018, 1892). New Mexico — £. Palmer, 1869 (? too young). 
Related to 7. Dudleyi Wiegand and /. tenuis Willd., but differ- 
ing from the former in the loose sheaths with simply membranous 
receding auricles. The flowers are as large as the largest of 
J. Dudleyi and even more comose in appearance. From /. tenuis 
it differs in the absence of scarious sheath-margins and auricles 
and in the usually more coriaceous capsule. In specimens at hand 
the plant has a peculiar rigid appearance, especially in the rigid 
pungent sepals, which is unlike that of the two related species. 
The separation of Juncus dichotomus from its allies has always 
seemed a comparatively easy matter, because the leaves of that 
plant have been found to be nearly terete in every case and not 
flattened as in the other closely related species. As was noted in 
