Name

Acaciella goldmanii Britton & Rose, N. Amer. Fl.  23: 99. 1928.

Rico Arce & Bachman
Anales del Jardín Botánico de Madrid
Vol. 63(2): 189-244
July-December 2006

Synonymy and types

Acacia goldmanii (Britton & Rose) Wiggins, Contr.  Dudley Herb. 3: 68 (1940). Type: Mexico: Baja California, Lower California Desert,  between San Pedro and Tres Pachilas, Nelson  & Goldman 7336 (lectotype, designated here, US!;  isolectotype, NY!). 

Acacia macmurphyi Wiggins, Contr. Dudley Herb. 3:  68. 1940. Type: Mexico; Baja California, 3-4 mi. north of Comondu,  26-IV-1931, Wiggins 5477 (holotype, DS;  photograph of holotype, MEXU!).

Formal description

Shrub to 3 m tall, glabrous. Stipules 2.25 mm long, to  1 mm wide, fugacious. Leaves 3-9 cm long; petiole 1.3-  3 cm long, channelled, glabrous or glabrescent; rachis  2-3.5 cm long, usually glabrous, with (3)4-5 pairs of  pinnae; pinnae (2.5)3-5.5 cm long; paraphyllidia up to  1 mm long; leaflets 14-28 pairs per pinna, 6-12 ×  (0.8)1-1.5 mm, narrowly oblong, base rounded, apex  acute, 1-veined, membranaceous, discolorous. Inflorescences  consisting of clusters of 2 racemes in branch  axils; peduncles 1.5-1.7 cm long, glabrous, without  pearl glands; inflorescence bracts not seen; floral bract  not seen; pedicels 0.6-0.7(0.8) mm long, glabrous;  flowers white, cream when dry, in short racemes up to  13 mm long at anthesis. Calyx 0.6 mm long, 5-lobed,  the lobes less than ¼ the length of the whole calyx,  glabrous. Corolla c. 2 mm long, 5-lobed, the lobes to  more than half the whole corolla lenth, glabrous. Stamens  3.5 mm long. Ovary 1.2 mm high, glabrous,  short-stipitate, the stipe shorter than the ovary; basal  nectary 0.3 mm high. Legume 4.5-4.7 (6) × (0.8)-1 × 0.2  cm, flat, straight, tardily dehiscent along both sutures;  valves chartaceous, conspicuously reticulate-veined,  glabrous, acute at the base and apex; stipe 0.7-1 cm  long; beak absent. Seeds 4-6 per fruit, widely elliptic,  3.7-4.6 × 2.4-3.7 × 1.4-1.8 mm.

Distribution

Endemic to Baja California, Mexico.

Additional info

Habitat. 0-1600 m. Dry scrub, or scrubland, often  along watercourses and along the coast.

Flowering time

 Flowering September to April, fruiting  recorded from September to January. 

Representative specimens

MEXICO:

Baja California:

• 2 km N of Cabo San Lucas on road  to Todos Santos, 22º 53' N, 109º 54' W, 33 m, 26-X-1977,  Breedlove, D.E. 43441 (MEXU);
• NNE of Los Frailes, 23º 24' N,  109º 25' W, 200 m, 21-X-1981, Burgess, T.L. 6253 (MEXU);
• Cerro  Gabilan, 25º 50' N, 111º 24' W, 1300 m, 4-X-1965, Carter, A.  5122 (BM, MEXU, TEX);
• El Cien, 24º 17' N, 110º 58' W, 125 m,  22-I-1992, Hughes, C.E. 1549 (FCME, FHO, K, MEXU, MO,  NY);
• Arroyo near km 123, NW of La Paz, 24º 28' N, 111º 12' W,  20-XI- 1959, Wiggins, I.L. 15589 (CAS, G, K, MEXU).

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