ENGELMANN—-NORTH AM. SPECIES OF JUNCUS. 451 
the subglo obose, mucronate, but never retuse, capsule is not 
yet formed. e seeds are very similar to the smaller ones 
Washington, ie it is “oles the nredt in the bolo or 
of the mature plants of this and the last species is quite 
striking; the latter becomes pale err es: while J. di- 
chotomus —— ark green, and the ripe pods assume a 
mahogany color.—The northern limit of this me or) to 
be on the Chesapeake bay, whence it extends to F 
25. J. GERARDI, acing notic. (1810) p. 60, ex Kunth En. 3, 
352; Koch syn. Germ, 731, is well distinguished from J. 
bulbosus, Linn., ich “has never, I believe, been found in 
America, by the subterete stem, the much larger flowers, 
which are as long as the capsule ; by the large linear anthers 
and very short filaments, the long stvle, which is equal to the 
ovary, and by the larger seeds. These are 0.31-0.33 line 
long, while those of J. tay ip are only 0.23 line long; 
a, n 
Chicago by Dr. Vasey. On the coast of New ‘England it it 
is well known under the name of “black .? and is cut 
in large Tuaations and makes pretty good hay (Oakes). 
26. J. puroNtus, Linn.; this well known weed, found all 
over the globe, and, perha s with the exception of J. sagi- 
noides, the only annual Juncus of our Flora, is most variable 
in its size, the size and disposition of the flowers, the propor- 
tion of inner and outer Sa and the size of the seeds. The 
seeds are ovate, very obtuse, and commonly very slightly 
apiculate, and delicately pepo 0.15-0.20 line is their 
usual length; I have rarely se em 0.22 1. long, gis ina 
Galveston specimen have found pee only 0.13 1. lon 
Only one marked variety has been distinguished iF the 
name of jfusciculatus, ath or fasciculiflorus, Boiss., appa- 
rently a southern form, common in our south-eastern ’States 
and in the south of Eu endl ; it is also found in the interesting 
colony of southern plants near the Philadelphia navy- -yard ; 
the last three or ne internodes of the branches of the ‘inflo- 
rescence are so much shortened that the flowers become 
crowded into ah a which gives the plant a very pecu- 
liar aspect. 
