Dalea capitata var. lupinocalyx Barneby
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Authors
Rupert C. Barneby
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Authority
Barneby, Rupert C. 1977. Daleae Imagines, an illustrated revision of Errazurizia Philippi, Psorothamnus Rydberg, Marine Liebmann, and Dalea Lucanus emen. Barneby, including all species of Leguminosae tribe Amorpheae Borissova ever referred to Dalea. Mem. New York Bot. Gard. 27: 1-892.
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Family
Fabaceae
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Scientific Name
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Type
Holotypus, NY; isotypi, CAS, MEXU, US.
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Description
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Species Description - Branchlets glabrous; foliage bright green, the leaflets up to 5.5 mm long, punctate above and beneath; spikes 7-25-flowered; petals glandless, the keel-blades 5.1-5.6 mm long, 3-3.4 mm wide; androecium 8.3-9.4 mm long. — Collections: 3 (ii).
Distribution and Ecology - Dry sunny hillsides in the pine-oak belt, 1500-1820 m (5000-6050 ft), local but forming extensive and colorful colonies near but e. of the crest of Sierra Madre Oriental between Galeana and Iturbide, s.-e. Nuevo Leon. — Flowering August to December.
Latin Diagnosis - Dalea capitata Wats. var. lupinocalyx (with calyx of Lupinus, the two adaxial teeth united) Barneby, var. nov., a var. capitata praesertim dentibus calycinis ventralibus inter se longe coadunatis, superiori calycis labio ideo spathaceo brevissime bidentato absimilis. Flores insuper majusculi, foliola majuscula laete viridia, petala apice eglandulosa notulas minus graves forsan haud diagnosticas offerrunt. A var. pseudo-hospite Barneby quoad calycis formam praesimili tubo calycino extus (ut apud var. capitatam) ex ipso basi undique sericeo-pilosulo abstat. — Nuevo Leon. Galeana: Sierra Madre Oriental e. of Pto Los Encinos, Oct 29, 1964, Ripley & Barneby 13,573.
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Discussion
(Plate CVI)
This variety and the next, each known only from one restricted area high on the east side of the Sierra Madre crest, differ collectively from the two foregoing in the modified calyx, of which the two upper teeth are united for half their length or more into a single apically bidentate lobe. More collections from the Sierra may well show that var. lupinocalyx and var. pseudo-hospes are merely pubescence-variants of one more variable entity, but there is no evidence as yet on the point. The calyx of var. lupinocalyx resembles that of var. capitata in pubescence but is longer, as is the androecium. The glandless petals are not yet duplicated in the species.
Compared with var. capitata, the present plant is a showy one, laying down over the limestone gravel hillsides and along stony washes a carpet of foliage, at first bright green, in fall turning golden-yellow under the mass of flower. Decumbent branches around the edge of each clump root freely where they touch the soil, and it seems likely that some of the larger, now discontinuous patches may be made up of severed parts of a single aged clone.
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Objects
Material: Nuevo Leon. Galeana: 10 mi from Galeana on road to Iturbide, Graham & Johnston 4230 (MEXU, MICH, TEX); approximate topotypes, Ripley & Barneby 14,778 (ARIZ, CAS, DAO, GH, IA, K, MEXU, MICH, UC, US).
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Distribution
Nuevo León Mexico North America| Mexico North America|