86 Rhodora [May 
blades, the remote uppermost barely inflated toward the dark-edged 
tip: flowering spikelet globose-obovoid, barely 1 cm. long; fruiting 
spikelet globose, 2-3.5 cm. broad: scales lead-color, the outer ovate- 
lanceolate, the inner lance-attenuate: bristles sordid-white.— Æ. 
vaginatum, var. opacum, Bjórnstr, Grunddr. af Piteå Lappm. 
Vüxtfys. 35 (1856); Fries, Bot. Not. (1857) 11. Æ. callitrix, 
Anders. Bot. Not. (1857) 60; Fries, Bot. Not. (1858) 63; Blytt, 
Norges Fl. 270 (1861); Liebm. & Lange [callithrix], Fl. Dan. 
Suppl. t. 122 (1874); Hartm., Skand. Fl. ed. 11, 450 (1879); Palla, 
Bot. Zeit. liv, ab. 1, 148, 151 (1896); Ostenfeld, Fl. Arct. 41 (1902); 
not Chamisso. Æ. vaginatum, Macoun, Cat. Can. Pl, ii. 103 (1888), 
in part. Examined from the following American stations. ONTARIO, 
peat bogs, Hastings County, July 21, 1873 (J. Macoun): SASKATCHE- 
WAN, muskeag north of Prince Albert, July 3, 1896 (7. Macoun, 
Herb. Geol. Surv. Can., no. 16,384): ATHABASCA, bogs, Clearwater 
River, July 11, 1888 (/. M. Macoun, Herb. Geol. Surv. Can., no 
32,297): ALBERTA, boggy places, Canmore, June 30, 1885 (/. 
Macoun, Herb. Geol. Surv. Can., no. 32,293); Banff, July 4, 1891 
(/. Macoun, Herb. Geol. Surv. Can., no. 7,574); outlet of Lake 
Louise, August 14, 1897: (E. Brainerd): YUKON, marsh, 1500 feet 
above Hunker Creek, July 27, and Independence Creek, Aug. 1, 
1902 (/. Macoun, Herb. Geol. Surv. Can., nos. 53,840 and 53,943): 
BRITISH COLUMBIA, east of Stewart's Lake, June 19, 1875 (/. Macoun, 
Herb. Geol. Surv. Can., no. 32,292); headwaters of Fraser River, 
July 21, 1898 (W. Spreadborough, Herb. Geol. Surv. Can.. no. 20,779). 
Very local in Arctic Europe and Asia. 
$ $ PHYLLANTHELA, Andersson, Cyp. -— 12 (1849). 
Spikelets several (rarely 1), subtended by 1 or more foliaceous bracts. 
* Leaves slender, triangular-channeled throughout: involucre a single 
upright slender colored bract much shorter than the inflorescence. 
+ Upper cauline leaf with the sheath longer than the blade. 
E. GRACILE, Koch. Weak and very slender, the subterete glabrous 
culms 2-6 dm. high, with'no young basal leaves developed at flower- 
ing season: sheath of the upper cauline leaf 3.5-5.5 cm. long, the 
round-tipped smooth blade 1-4 cm. long, 1-1.5 mm. broad: involu- 
cral bract similar, usually dark at base, 1-2 cm. long: spikelets 2 to 
5, the central one subsessile, the others on slender unequal minutely 
hairy spreading-ascending or finally nodding peduncles (0.5-3 cm. 
