Acacia linifolia Willd.
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Authority
Isley, Duane. 1973. Leguminosae of the United States: I. Subfamily. Mimosoideae. Mem. New York Bot. Gard. 25 (1): 1-152.
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Family
Mimosaceae
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Scientific Name
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Description
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Species Description - Glabrate shrub. Leaves simple, ascending, oblong-oblanceolate to linear, 2-4 cm long, mostly 1-2 mm wide, not mucronulate; gland inconspicuous, 1/5-1/3 distance from base. Flowers 6-12 in yellow heads ca 3 mm diam in axillary or terminally congested racemes; peduncles 2-3 mm, glabrous. Legume oblong, flat, 4-8(-10) cm long, 8-13 mm wide; valves black, somewhat glaucous.
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Discussion
A. linearis (J. Wendl.) Macbride and Hort., pro parte Urban California. Occasional in cultivation. Feb.-March. Native of Australia. Acacia linifolia and several related species are present in California and enumerated by horticultural references as Bailey & Bailey (1941). I am not sure which of these should be taken up as “cultivated” as defined herein, and the “acceptance” of A. linifolia is arbitrary. It contrasts with similar species of which I have seen U.S. material as follows: 1. Twigs evidently ciliate along decurrent ridges; leaves with a fringe of hairs along the margin. A. fimbriata A. Cunn. ex G. Don. 1. Twigs and leaves lacking above ciliation (or twigs ciliate in A. prominens but leaves not so). 2. Foliar gland conspicuous, exserted; leaves elliptic-lanceolate to broadly oblanceolate, 4—9 mm wide, glaucous. A. prominens A. Cunn. ex G. Don. 2. Foliar gland(s) evident or inconspicuous, not exserted; leaves linear to oblanceolate, 1—5 (—6) mm wide, greenish or glaucous. 3. Leaves broadly to narrowly oblanceolate, 3-5 mm wide, somewhat glaucous, with one or two glands, neither well below middle of leaf; heads ca 20 flowered; peduncles puberulent with fine appressed hairs. A. decora Reich. 3. Leaves oblong to linear-oblanceolate or linear, 1-2 (-3) mm wide, green with 1 gland well below middle of blade; heads 6-12 flowered; peduncles glabrate. A. linifolia (Vent.) Willd.