Calliandra houstoniana var. acapulcensis

Title

Calliandra houstoniana var. acapulcensis

Author(s)

Rupert C. Barneby

Scientific Name

Calliandra houstoniana var. acapulcensis (Britton & Rose) Barneby

Description

118c. Calliandra houstoniana (Miller) Standley var. acapulcensis (Britton & Rose) Barneby, stat. nov. Anneslia acapulcensis Britton & Rose, N. Amer. Fl. 23: 72. 1928. — "[Mexico.] Acapulco, Guerrero, October, 1894, [Edward] Palmer 59." — Holotypus (fr), NY!. — Calliandra acapulcensis Standley, Field Mus. Nat. Hist., Bot. Ser. 11: 159. 1936. Referred by Macqueen and H. M. Hernández to C. calothyrsus.

Lf-formula (v-)vi-ix(-x)/(18-)20-36(-39); lf-stk of longer lvs 6-15 cm, the longer interpinnal segments 7-14 mm; rachis of longer pinnae 4-8 cm; lfts linear or linear-lanceolate acute, straight or nearly so, the longer ones 5.5-10.5 x 1.4-2.4(-2.7) mm, (3.2-)3.5-5.2 times as long as wide, the scarcely displaced midrib faintly 5-8-branched on each side in young lvs, the secondary venules scarcely visible in older ones. Inflorescence-axes gray-pilosulous or subglabrous, the primary one mostly 7-20 cm, but out-of-season sometimes shorter; peduncles 7-12 mm; pedicels 1-4 mm; calyx 1.3-1.7 x 1.7-2.3 mm, the teeth 0.25-0.55 mm; corolla 6.5-9 mm; androecium of var. calothyrsus, but the tassel bicolored, pallid in proximal half, thence pink-crimson. Pods in profile 6-12 x 0.9-1.4 cm, puberulent or pilosulous overall.

In tropical deciduous woodland, from near sea level to 600 m, thence ascending into oak forest to 1950 m, scattered within part of the range of var. anomala in Mexico s. of the Transverse Volcánic Range, from w. Jalisco and Colima s.-e. to the Pacific slope in Oaxaca. — Fl. VIII—II.