Scales and Anthers
14 Miles North
and 3.85 Miles East of Hudson Bay
Note the scale
midribs fade distally and do not reach the scale tip. Note also the
anthers are more than 2 mm long.
Answers to key questions in Rushes,
Bulrushes & Pondweeds plus the remaining Monocots of Saskatchewan by V.
L. Harms, A. L. Leighton, and M. A. Vetter leading to this species. The
answers are in the order you
would normally work through the key.
usually 2 or more, drooping or spreading on peduncles; leaf-like
inflorescence bracts present; distal-most cauline leaves with blades at
least 1 cm long and usually longer than their sheaths (shorter in E.
gracile); lower scales of spikelets usually fertile (subtending
flowers). NOT [Spikelets solitary, erect at tip of culm; leaf-like
inflorescence bracts absent; distal-most cauline leaves usually reduced
to bladeless sheaths; lower scales of spikelets usually empty (without
inflorescence bracts 1 - 5; leaf blades 1.5 - 6 (8) mm wide, flat
proximally, trigonous at tip; scales 4 - 10 mm long, with apices acute.
NOT [Leaf-like inflorescence bracts 1; leaf blades 1 - 2 mm wide (to 3
mm in E. tenellum), channelled their full length and trigonous at
tip; scales 3 - 4 mm long (to 4.5 mm in E. tenellum) with apices obtuse
Midribs of scales fading distally and not reaching tip of scales;
anthers 2 - 5 mm long; peduncles smooth or scabrous on angles only.
NOT [Midribs of
scales prominent, enlarged distally and reaching tip of scales,
sometimes excurrent; anthers 0.8 - 2 mm long; peduncles scabrous.]
to key questions in Rushes, Bulrushes & Pondweeds plus the remaining
Monocots of Saskatchewan by V. L. Harms, A. L. Leighton, and M. A. Vetter
leading to this genus. The
answers are in the order you would normally work through the key.
and achenes naked in the axils of scales, not enclosed in a sac; flowers
usually perfect (sometimes some flowers imperfect in Cyperus, Rhynchospora
and Cladium). NOT [. Flowers and achenes enclosed in
a sac (perigynium) borne in the axils of scales; flowers imperfect.]
bristles usually more than 10 per flower, much longer than the achenes,
conspicuously elongated to over 10 mm long in fruit stage and usually
obscuring most scales in spikelets. NOT [Perianth bristles absent
or up to 6 per flower; if more than 6, then only somewhat longer than
Cyperaceae: Answers to key questions
in Budd's Flora leading to this family.
aquatic, or if growing in water, most of the plant emersed; NOT [plants
aquatic, floating or submerged, with floating leaves or emersed
usually solid; NOT culms usually hollow]
three-ranked; NOT [leaves two-ranked]
NOT [a dense, single, cylindrical spike 8-15 cm long, 1-2.5 cm thick],
if a single spike, less than 1 cm thick
not in globular heads; NOT [flowers in globular heads, the upper ones
staminate, the lower ones pistillate]
solitary in the axil of a single bract (scale); NOT [flowers enclosed in
two-ranked bracts with the lowest (glumes) empty]
absent or inconspicuous, not in two whorls; NOT [perianth present,
conspicuous, in two whorls of 3 segments each, often brightly colored]
reduced to bristles or scales or lacking; NOT [perianth reduced to
minute lodicules or lacking]