ists oi Jiurope, where. both forms are much more abundant.— 
With us this species is confined to the northern and western 
, ERRATA. 
Page 304, line 7 from below, instead of “absolute,” read obsolete . 
root-stock. 
microcephalus. 
leptocaulis, T. & G. 
obtuse at the upper one, 0.30-0.35 line long.—The alpine form 
of this plant, the original type of Villars, is found in our Arc¬ 
tic regions, and is only a few inches high, bearing very few 
almost black heads, and has the slenderest and longest seeds. 
The ordinary American plant is distinguished from the usual 
European form by its lower stems, still stricter panicle, and 
paler flowers and fruit. Fries has sent absolutely the same 
from Sweden, formerly as J. sylvaticus , and as J. acutiflorus , 
and later as J alpinus , var. insignis , which name may be re¬ 
tained for it. 
85. J. dijbius, n. sp.: rhizomate crasso horizontali; caulibus 
(li-3-pedalibus) erectis cum foliis tereti-compressis; pa- 
nicula supradecomposita patula; capitulis pauei-(6-10)floris 
stramipeis; floribus subsessilibus; sepalis lanceolato-subulatis 
acutissimis sequalibus stamina six fere duplo superantibus; an- 
theris linearibus filamento sublongioribus ; capsula lineari- 
prismatica acutata uniloculari exserta; seminibus obovatis 
utrumque apiculatis areis lineolatis reticulatis. 
Forming large tufts in wet granitic sand in Clark’s meadow, 
near the Big Tree Grove, Mariposa, California, at an altitude 
of 6,500 feet, H. Bolander , fl. & fr. in July; Cal. State Surv., 
“rudis,” 
“Buckleyi , 
