Editor(s):
Ya Yang


  Name:      Euphorbia macropus   (Klotzsch & Garcke) Boiss., Prodr. 15(2): 52. 1862.

Status:accepted_name
Accepted Name:None
Basionym:None
Common Names:
Huachuca mountain spurge
TOLKIN GUID:3bd39802-bec7-43f2-b7ae-c1dae4edb198
TOLKIN GUID URL:http://app.tolkin.org/guids/3bd39802-bec7-43f2-b7ae-c1dae4edb198
Type Details:
Species:
Anisophyllum macropus Klotzsch & Garcke
Type Collection:None
Type Date: None
Type Locality: None
Type Herbaria: None
Neo Type: None
Synonyms: show/hide
Name
Namestatus
Anisophyllum crassipes Klotzsch, Abh. Königl. Akad. Wiss. Berlin 1859: 38. 1860.
Synonym
Anisophyllum macropus Klotzsch & Garcke, Abh. Königl. Akad. Wiss. Berlin 1859: 33. 1860.
Synonym
Euphorbia tenera S. Watson, Proc. Amer. Acad. Arts 18: 150. 1883.
Synonym
Euphorbia plummerae S. Watson, Proc. Amer. Acad. Arts 18: 195. 1883.
Synonym
Euphorbia biformis S. Watson, Proc. Amer. Acad. Arts 18: 151. 1883.
Synonym
Euphorbia retroscabra S. Watson, Proc. Amer. Acad. Arts 22: 449. 1887.
Synonym
Euphorbia chaculana Donn. Sm., Bot. Gaz. 27: 441. 1899.
Synonym
Zygophyllidum biforme (S. Watson) Arthur, Torreya 11: 260. 1911.
Synonym
Eumecanthus tener (S. Watson) Millsp., Publ. Field Mus. Nat. Hist., Bot. Ser. 2: 415. 1916.
Synonym
Euphorbia hondurana Standl. & L.O. Williams, Ceiba 1: 150. 1950.
Synonym
Subgenus:
Chamaesyce
Section:
Alectoroctonum
Subsection: None
Ingroup Clade:
D
Description:
Adapted from Flora of North America, treatment by Victor W. Steinmann (description and habitat information based on U.S.A. collections only):

Herbs, perennial, from a thick, sphaerical to elongated tuber, 2-8 cm. Stems erect to ascending, branched, glabrous, puberulent or densely hirsute to setose (often with a 2-layered indumentum of long hairs intermixed with short hairs), 10-45(60) cm. Leaves opposite (occasionally whorled distally or rarely with one or two alternate leaves); stipules filiform to narrowly cylindrical, 0.1-0.2 mm; petiole to 18 mm (or often absent), hirsute, sericeous, or strigose, blade linear to ovate or almost orbicular (variable in form and shape), 6-54 x 2-19 mm, base rounded to attenuate, apex acute to obtuse, margins entire (occasionally ciliate, with stiff recurved hairs), venation conspicuous, hirsute, sericeous, or strigose (or occasionally glabrous adaxially). Cyathia in weakly-defined terminal dichasia; peduncle 1.4-5.8 mm, glabrous. Involucre obconical to campanulate, 1.1-1.4 x 0.5-1.5 mm, glabrous or strigulose; glands 4-5, oblong, 0.2 x 0.4-0.5 mm, greenish; appendages ovate, flabellate, semi-orbicular or oblong, generally entire, 0.3-0.9 x 0.4-1.1 mm, yellowish, green or rarely dark purple. Staminate flowers 10-15. Pistillate flower: ovary glabrous, sericeous or strigulose; styles 0.4-0.6 mm, 2-fid ca. 1/2 their length. Capsule oblate, 2.3-3 x 3.1-4.2 mm, glabrous, sericaeous, or strigulose; columella 1.6-2.1 mm. Seeds broadly ovoid to subglobose, rounded in cross-section, 1.5-2.3 x 1.4-1.8 mm, black to light brown, smooth or with low rounded tubercles; caruncle absent.
Habitat:
Streambanks and rocky slopes in pine-oak woodland, sometimes with juniper, and Douglas fir with pine forest; 1500-2200m. Flowering and fruiting summer to fall.
Phylogenetic Relationships: None
Comments:
This widespread and common Mexican species just barely enters into the U.S. in southeastern Arizona, where most of the collections are from the Huachuca Mountains.
Chromosome Number: None
Uses: None
Toxicity: None
Conservation Status: None
General Distribution:
U.S.A. (Arizona) to Mexico; Central America (Guatemala, Honduras, El Salvador)
Collector
Collection number
Country
Institution code
Carrillo-Reyes, P.
3358
Mexico
GUADA, IEB
Carrillo-Reyes, P.
4055
Mexico
IBUG, IEB, MICH
Carrillo-Reyes, P.
4314
Mexico
IBUG
Carrillo-Reyes, P.
4394
Mexico
Carrillo-Reyes, P.
4693
Mexico
Carrillo-Reyes, P.
5554
Mexico
MICH
Carrillo-Reyes, P.
5567
Mexico
Carrillo-Reyes, P.
5602
Mexico
MICH
Carrillo-Reyes, P.
5605
Mexico
MICH
Carrillo-Reyes, P.
5652
Mexico
DNA Sample(s): 6329
DNA Sample(s) Sequences
References:

Berry, P.E., Peirson, J., Steinmann, V.W., Morawetz, J.J., Riina, R., Yang, Y., Geltman, D.V., and Cacho, N.I. (in review). "Euphorbia." In: Flora of North America north of Mexico 12, Flora of North America Editorial Committee. New York and Oxford.

Huft, M.J. (1979). A monograph of Euphorbia section Tithymalopsis. Ph.D. dissertation, University of Michigan, Ann Arbor.

Yang, Y., Riina, R., Morawetz, J.J., Steinmann, V.W., Haevermans, T., Aubriot, X., and Berry, P.E. (2012). Molecular phylogenetics and classification of Euphorbia subgenus Chamaesyce (Euphorbiaceae). Taxon 61(4), 764-789.


This project's data is shared under the CC-BY license.