Kenneth Kent Mackenzie

Carex albonigra is a species of sedge known by the common name black and white sedge. It is native to western North America from Alaska and most of western Canada to California to New Mexico, where it grows in mainly dry, rocky high mountain habitat such as talus. This sedge forms a dense clump 10 to 30 centimeters in height with narrow gray-green leaves. The inflorescence is a headlike cluster of overlapping spikes. The fruit is coated in a sac called a perigynium which is dark purple to chestnut brown and often tipped with white.

Smallanthus is a genus of flowering plants in the tribe Millerieae within the family Asteraceae.

Carex concinnoides is a species of sedge known by the common name northwestern sedge. It is native to western North America from British Columbia to California, where it can be found in moist or dry habitat, often in woodland and forested slopes, on silty and clay soils. This sedge produces loose clumps of stems up to about 35 centimeters in maximum height from long rhizomes. The leaves are thick but narrow, sickle-shaped, and pale green in color. Inflorescences occur at the stem tips, and some pistillate inflorescences grow from nodes along the stem. The spikelets have purplish bracts. The

Carex cusickii (common name, Cusick's sedge) is a type of grass-like plant in the family Cyperaceae. It is native to Northwestern North America from British Columbia to California, and in Utah, where it can be found in several types of wetland habitat, such as marshes, mountain meadows, and ditches. In its range it is most common in the Cascade Range and areas west.

Carex abrupta is a species of sedge known by the common name abrupt-beaked sedge or abruptbeak sedge. It is native to the western United States from California to Idaho, where it grows in moist mountain habitat such as meadows and slopes.

Carex microptera is a species of sedge known by the common name smallwing sedge. It is native to western North America, including most all of western Canada and the western United States. It occurs in moist mountain habitat such as meadows and riverbanks. This sedge produces dense clumps of erect stems over 20 centimeters tall and up to about a meter in height. The inflorescence is a dense cluster of green or brown spikes packed tightly and indistinct from each other.

Carex helleri is a species of sedge known by the common name Heller's sedge. It is native to eastern California and western Nevada, where it grows on rocky mountain slopes and in other habitats.

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Carex fracta is a species of sedge known by the common name fragile sheath sedge. It is native to the western United States from Washington to California, where it grows in moist to dry areas in mountain forests and meadows. This sedge produces dense clumps of stems sometimes exceeding a meter tall. The leaves are attached to the stem with a characteristic thin, membranous sheath. The inflorescence is a dense or loose cluster of light green to gold spikes. Some spikes occur lower on the stem as well. The flowers are covered in light colored scales.

Carex neurophora is a species of sedge known by the common name alpine nerve sedge. It is native to the western United States, where it grows in wet mountain habitat such as meadows and streambanks. This sedge produces stems up to about 60 centimeters tall and inflorescences which are dense, oblong clusters of indistinguishable spikes of flowers.

Carex multicostata is a species of sedge known by the common name manyrib sedge.

Carex mariposana is a species of sedge known by the common name Mariposa sedge.

Carex leporinella is a species of sedge known by the common name Sierra hare sedge.

Carex bushii, Bush's sedge, is a species of sedge in the genus Carex. It native to the eastern United States where it is found in areas of natural grassland. Carex bushii is distinguished from the similar Carex caroliniana, Carex complanata, and Carex hirsutella by having pistillate scales that are at least as long as the perigynia (the covering of the achene).

Carex aggregata is a species of sedge that was first described by Kenneth Mackenzie in 1910. It is native to the eastern United States and Canada.

Carex abscondita, the thicket sedge, is a North American species of sedge first described by Kenneth Mackenzie in 1910.

Carex simulata is a species of sedge known by the common name analogue sedge.

Carex sheldonii is a species of sedge known by the common name Sheldon's sedge.

Carex proposita is a species of sedge known by the common name Great Smoky Mountain sedge. It has a scattered distribution in parts of the western United States, including Washington, Idaho, and California. It was named for the Smoky Mountains of Idaho, not the Great Smoky Mountains, where it does not occur. This sedge produces low, dense clumps of stems under 35 centimeters tall. The inflorescence is a dense or open bundle of rounded or oval brown flower spikes. The fruit is coated in a veined perigynium with a white tip.

Carex praeceptorum (orth.var. C. praeceptorium) is a species of sedge known by the common names early sedge and teacher's sedge.

Carex molesta is a species of sedge known by the common name troublesome sedge. It is native to eastern and central North America, where it grows in varied wet and dry habitats, performs equally well in full sun and partial shade, including disturbed areas such as roadsides. It is an introduced species and often a weed in California.

Carex hirtifolia, the pubescent sedge, is a species of sedge native to northeastern North America. It is the only species in Carex section Hirtifoliae. The entire plant is distinctively covered soft hairs.

Carex brainerdii, or Brainerd's sedge, is a species of sedge that was first described by Kenneth Mackenzie in 1913. It is native to California and Oregon.

Carex austrina, known as southern sedge, is a species of sedge endemic to the southern and central United States. It was first described as Carex muehlenbergii var. australis Olney ex L.H.Bailey in 1886.

Carex atrosquama, the lesser blackscale sedge, is a species of sedge described by Kenneth Kent Mackenzie in 1912. It is native to the northwestern United States and western Canada, from Alaska south to Utah and Colorado. It grows in alpine and subalpine meadows, or along rivers and streams in gravelly areas.

Carex amplectens, the claspbract sedge, is a species of sedge that was first described by Kenneth Mackenzie in 1917.

Carex unilateralis, the lateral sedge, is a species of sedge that was first described by Kenneth Mackenzie in 1922. The specific epithet, unilateralis, is derived from Latin and means "one-sided".

Carex tumulicola, the splitawn sedge foothill sedge, or previously Berkeley sedge, is a sedge member of the family Cyperaceae.

Carex swanii, known as Swan's sedge or downy green sedge, is a species of flowering plant in the family Cyperaceae. It is native to eastern North America. It was originally described as Carex virescens var. swanii Fernald in 1906, then elevated to species in 1910. The species was named for Charles Walter Swan (1838-1921), a naval surgeon and early member of the New England Botanical Club.

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