laminae 0.3–1 mm. Disc-florets 8–30+. Cypselae uniformly pale tan to light gray-brown, 1–1.5 mm, faces sparsely strigillose; pappi of 15–25, white bristles
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533. Mentioned on page 532, 534. Stems: trunk bark light gray, ± exfoliating; 1-year old twigs gray. Leaves: blade ± lanceolate, narrowly elliptic to narrowly
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knobby short-shoots, 70–150 cm, puberulent-tomentose, bark grayish red to light gray. Leaves alternate, well spaced on long-shoots or fasciculate on short-shoots;
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80 dm. Stems: twigs: new growth reddish, 1-year old tan, 2-years old light gray; thorns on twigs straight, 2-years old blackish, usually shiny, ± slender
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3.3–4.8 mm, glabrous or sparsely villous; columella 1.8–2.1 mm. Seeds light gray, ovoid, 2.2–2.4 × 1.6–1.8 mm, with shallow depressions; caruncle absent
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usually glabrous, sometimes sparsely puberulent; columella 2.4–3.3 mm. Seeds light gray, cylindric ovoid-oblong, 2–2.8 (–3) × 1.4–2.2 mm, irregularly shallowly
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Leaf blades usually tapered-acute at base, rarely rounded; bark light gray to reddish gray, checkered with squarish to rectangular segments or plates, 1-4
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portion of the style may be slightly maroon; the stigmas are grayish or light green. The stems of L. rigidum are angled. Its capsule walls are so thin
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pistillate florets with laminae 0.3–1+ mm; cypselae uniformly pale tan to light gray-brown Conyza canadensis
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distinctly pubescent, 7-veined, veins usually prominent; upper lemmas light-brown, gray, and purple. 2n = 36. Pacific Islands (Hawaii) Introduced from Africa
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specimens actually belong to var. microphyllus but are abaxially off-white to light gray and tomentose to villous. None. None. "chartaceous" is not a number.window
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mollis group, caducous and membranous, and bright crimson when fresh. The light gray bark flakes off in long narrow strips, which is unusual in Crataegus.
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of its distal leaves and peduncle bracts. The hairs give the plants a light gray-green appearance from a distance. The leaves are stiff, unlike other taxa
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usually promptly exfoliating, reddish, (thin), or, sometimes, persistent, gray, rough, shredded (A. morroensis, A. nissenana, A. nummularia, A. osoensis
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or membranous; distally ± scarious, often black, brown, castaneous, cream, gray, green, olivaceous, pink, red, white, or yellow), apices usually acute, sometimes
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Seeds 1–65 [–200], tan, yellowish-brown, light-brown, pale green, brown, reddish-brown, silver-gray, or gray to black (papillose or tuberculate); arillate
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Mentzelia tiehmii, Mentzelia todiltoensis, Mentzelia uintahensis (Torrey & A. Gray) Bentham & Hooker f. Gen. Pl. 1 : 804. 1867. John J. Schenk, Larry Hufford
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not glaucous abaxially), hairs usually white, sometimes also ferruginous or gray; juvenile blade hairs white, sometimes also ferruginous. Catkins flowering
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sometimes glabrate or glabrous, 1-year old purple-brown, older gray or dark gray, sometimes gray-brown; thorns on twigs absent or sparse to numerous, usually
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(0.3–1.4 mm, length 5–20% longer inner), inner 2–3 series of 25–50 light tan to light rust, unequal, barbellate, apically attenuate or weakly clavate bristles
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