HOFFMANN: FLORA OF BERKSHIRE CQUNTY. 239 
e'. Auricles at the summit of the sheaths not conspicuousl}' extended 
beyond the point of insertion. 
Bracts shorter than the cymes, flowers 2.5 to 3.5 mm. long, scat- 
tered and secund along the ascending or incurved branches, 
plant of dry soil, infrequent /. secundus. 
Bracts (or at least the lowermost) exceeding the cymes; flowers 
mostly larger, not conspicuously secund, plant chiefly of moist 
places, common /. Dudleyi. 
d'. Base bulbous and stoloniferous, leaves linear J. marginatus. 
Leaves hollow, nodulose, i. e., with divisions at regular intervals which 
show as dark transverse lines. 
/. Seeds with definite caudate tips. 
g. Flowers with the mature fruit about 2.5 (rarely 3.5) mm. 
long; sepals obtuse; seed ellipsoid, barely 1 mm. long, with 
very short tails J. brachycephalus. 
g'. Flowers with mature fruit about 4 mm. long; petals atten- 
uate, acute; seed spindle-shaped, with conspicuous tails. 
Inflorescence one-third longer than broad; capsule equalling 
or slightly exceeding the calyx J. canademis. 
Inflorescence elongate; strict and narrow, 3 to 6 times longer 
than broad; cap.sule much exceeding the calyx. 
/. brevicavdatus. 
f. Seeds merely pointed, or blunt, not caudate. 
h. Stamens 3 .J. acuminatus. 
h'. Stamens 6. 
i. lipper cauline leaves bladeless (or essentially so), con- 
sisting of firm tawny or colored sheaths 2.5 to 5 cm. 
long; the middle leaf erect, much overtopping the 
inflorescence; rare J. militaris. 
i'. Upper cauline leaves with blades, or if bladeless, very 
small. 
j. Flowers solitary, or in 2's /. pelocarpxis. 
j'. Flowers more numerous, in glomerules. 
A-. Glomerulos spherical; sepals subulate; capsules 
subulate or lance-subulate; involucral bract 
usually exceeding the inflorescence. J. iiodosus. 
k', Cilomerules hemispherical; sei)als blunt or acumi- 
nate, at most mucronate-tip|ied; cap.sules ovoid 
or ellipsoid; involucral bract much shorter than 
the inflorescence. 
Flower brown or brownisli; capsule dark brown, 
3 to I mm. long, gradually tapering to the 
mucronalc tip ./• articulatus. 
Flower greenish; cipsult' pale Ijrown, 2.5 to ',\ mm. 
long, al)niplly inucroiiate. 
J. artlculdtus, var. obtusatus. 
