UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



BOTANY 



Vol. 7, No. 13, pp. 437-446 August 7, 1922 



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, YORK. 

 b../rAN5CAL 

 UA!<t>BN 



UNDESCRIBED PLANTS MOSTLY FROM 

 BAJA CALIFORNIA 



BY 

 IVAN MUEEAY JOHNSTON 



Ephedra peninsiilaris sp. nov. 



Fniticulus intricatus superne dense ramosus, ca. 8 dm. altus ; 

 ramis tenuibus, patentibus, numerosis, pallide viridibus; squamis 2, 

 1.0-1.7 mm. longis, Mi-% eonnatis. apice late triangularis vel obtusis, 

 basi plerumque brunneis incrassatis ; spiculis axillaribus. solitariis vel 

 geminatis; spicula mascula ovato-oblonga, 5-6 mm. longa; pedicellis 

 0.1 mm. longis; bracteis 3-4 vertieillastris. orbicularibus ; perianthio 

 obovato plernmqne exerto; staminibus distincte exertis; antheris 5-7,. 

 stipitatis vel subsessilibus ; spiculis f emineis acute ovatis, 6-8 mm. 

 longis ; bracteis frutescentibus ovato-orbicularibus, sessilibus, margine 

 seariosis; fructu multo exserto, solitario, triquetro, glabro, castaneo, 

 5-6 mm. longo. 



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Type. — Magdalena Island, Baja California, January 12, 1889, 

 T. S. Brandegee. Sheet no. 119069 in Herb. Univ. Calif. 



This is the common and widely distributed Ephedra of Baja Cali- 

 fornia, which ranges over the peninsula from the cape region north- 

 ward at least to Calmalli and Cedros Island. The only other Ephedra 

 that I have seen from the peninsula is the three-bracted E. californica, 

 which occurs in the northernmost parts of the territory. I have 

 examined material representing the new species collected by Purpus 

 at Las Animas (269) and Calmalli (6), by Brandegee at INIagdalena 

 Bay and Calmalli, by Anthony on Cedros Island (281), and by myself 

 on Coronados Island in the Gulf of California (3757). Brandegee 

 (Proc. Calif. Acad. Sci., II, 2:205. 1899) reports the plant as E. 

 nevadensis; but the ranges of E. nevadensis and E. peninsularis are 

 separated by a broad geographical hiatus, and, furthermore, the two 

 species are quite distinct morphologically. The latter species differs 

 from E. nevadensis in its more slender and limber stems, shorter and 



