Dalea leucostachya var. eysenhardtioides

  • Title

    Dalea leucostachya var. eysenhardtioides

  • Authors

    Rupert C. Barneby

  • Scientific Name

    Dalea leucostachya var. eysenhardtioides (Hemsl.) Barneby

  • Description

    54a. Dalea leucostachya Gray var. eysenhardtioides (Hemsley) Barneby

    (Plate LXIII)

    Maturing as a straggling shrub with crooked leafless trunks or single-stemmed tree- let up to 2-6 m tall, but flowering precociously when suffrutescent; foliage (especially associated with inflorescences) glabrous or glabrescent, green, the leaflets always glabrous above, sometimes both sides; panicle of spikes commonly leafless; n. = 7 (Spellenberg). — Collections: 25 (i).

    Pine-forest and mixed oak-pine woodlands, descending atypically into thorn-forest, (610) 900-2650 m (± 2000-8300 ft), locally abundant, Neo-volcanic range of s. Mexico from Cerro San Juan, Nayarit, and Sierra del Cuale, w. Jalisco e. and s.-e. to s.-w. Mexico and along Sierra Madre del Sur into Oaxaca; disjunctly in w. Chihuahua (Rio Mayo). — Flowering September to February. —Representative: Nayarit. Jalisco: Cerro San Juan, Mexia 688 (NY). Jalisco. Talpa de Allende: Sa. del Cuale, McVaugh 14,356 (MEXU, MICH); Mascota: Sa. La Campana, McVaugh 13,706 (MEXU, MICH). Amacueca: road to Tapalpa, McVaugh 20,666 (MICH). -: Volcan and Nevado de Colima, Villareal de Puga 120 (ENCB), McVaugh 13,435 (MEXU, MICH). Michoacan. Tancitaro: Tancitaro, Hinton 15,554 (ARIZ); Uruapan: Tara- scon, Pringle 10,119 (ARIZ, F, L, M, MEXU, NY, OK, UC, US, W, Z); w. of Uruapan, Ripley & Barneby 14,834 (CAS, DAO, MEXU, NY, US); Coalcoman: Sa. Tor- recillas, Hinton 12,777 (BR, F, NY, UC). Guerrero. Chichihualco: Cruz de Ocote, w.-s.-w. of Camotlan, Rzedowski 18,106 (ENCB). Mexico. Sultepec: Sultepec, Matuda 26,448 (MEXU, NY); Temascaltepec: Bejucos, Hinton 2007 (F, MEXU, NY, Z). Oaxaca. Sierra Madre del Sur, Galeotti (type of D. eysenhardtioides); s. loc., Ghies- breght 268 in 1844 (P). Chihuahua. Uruachic: Batopilillas, Gentry 2838 (ARIZ).

    Dalea leucostachya Gray var. eysenhardtioides (Hemsl.) Barneby, Phytologia 26: 1. 1973, based on D. eysenhardtioides (resembling Eysenhardtia in the panicle of small white flowers) Hemsl., Diag. Pl. Nov. 6. 1878. — "Mexico: in montibus Oaxacae prope Mare Pacificum, alt. 4000-7000 ped., Galeotti, 7013..." —Holotypus, dated 1840, K! isotypi, BR (herb. Galeott., herb. Mart.), P!—Parosela eysenhardtioides (Hemsl.) Rose, Contrib. U. S. Nat. Herb. 10: 104. 1910.

    This form of D. leucostachya was collected first by Sesse and Mocino (Herb. S. & M. 2681, MA) and was possibly described by them as Psoralea fruticosa (Pl. Nov. Hisp. 121. 1889), but the identification is far from certain.