84 Rhodora [May 
bands: inflorescence from dense to somewhat loose (1—4 em. in diameter). 
Uppermost sheath close, coriaceous, lustrous, usually castaneous 
throughout... 4 + 6+ © © © © © ng var. gracilis. 
Uppermost sheath looser, membranous, dull, greenish-drab above. 
var. brunneus. 
C. Flowers medium or large, sepals 2.5-4.2 mm. long (rarely shorter): 
perianth-segments with no very conspicuous brown bands, frequently 
firmer in texture, often rigid, appressed or somewhat spreading: in- 
florescence commonly open, rarely somewhat dense, 1.5-14 em. in 
diameter. 
Summit of the uppermost sheath broad, usually emarginate, the edges 
much overlapping almost or quite to the tip; and with the cluster of 
veins very strongly converging at the summit: sheaths rarely paler 
above: inflorescence conspicuously fastigiate. . . . var. pacificus. 
Summit of the uppermost sheath somewhat narrowed, merely rounded, 
the edges not overlapping within 1 em. of the top; veins much less 
strongly converging: upper sheaths much paler above: inflorescence 
irregularly spreading, rarely slightly fastigiate. 
Sepals rarely exceeding either the petals or the capsule, 2.5-3.5 mm. 
long, firm, not conspicuously spreading nor strongly contrasting in 
color with the capsule: culms 2-4.5 mm. in diameter at the top of 
the sheaths, not sulcate 2. s P lv. m 0 LEVAT NR 
Sepals exceeding both the petals and the capsule, 3-4.2 mm. long, 
firm or rigid in texture and usually somewhat spreading, commonly 
contrasting in color with the darker capsule: culms 1-3.5 mm. in 
diameter at the top of the sheaths, finely striate or deeply sulcate. 
var. Pylaei. 
Juncus Errusus L. Sp. Pl. 326 (1753). J. communis fd effusus E. 
Meyer, Junci Gen. Monog. Sp. 22 (1819). 
The typical form in Europe seems to be a plant of medium stature 
with non-sulcate culms and pale basal sheaths; the flowers small with 
soft perianth; the inflorescence also small. It has not yet been seen 
by us from America. 
Var. compactus Lejeune et Courtois, Comp. Fl. Belg. ii. 23 (1831). 
J. conglomeratus L. Sp. Pl. 326 (1753) probably in part. J. effusus 
var. conglomeratus of many authors, in part, not Engelm.— Plants 
tall and rather stout, deep-green, 4.5-12. dm. high: culms usually 
firm, faintly many-striate, 1.5-4 mm. in diameter at the top of the 
sheaths: sheaths large and rather loose, dull, pale- or chocolate-brown 
below; the uppermost rather thin, pale-brown or stramineous toward 
the summit, 6-14 em. long: involucral leaf 7-20 cm. long: inflorescence 
small compact and dense, 1-4.5 em. in diameter: perianth-divisions 
rather noticeably spreading from the base, soft in texture, curved and 
wrinkled when dry; the midrib broad and pale, with no conspicuous 
dark lateral bands; the margins broadly scarious; sepals 1.8-2.5 mm. 
