574 CONTRIBUTIONS FEOM THE NATIONAL HERBARIUM. 



5. Mascagnia cana Small, N. Ainer. Fl. 25 : 120. 1910. 



Hiraea sericea Engelm. ; A. Gray, PI. Wright. 1: 37. 1852. Not H. sericea 

 Juss. 1832. 



Mascagnia sericea Niedenzu, Mascagn. 29. 1908. 



Sonora to Durango and Coahuila ; type from Cadena, Ehirango. 



Apparently an erect shrub ; leaves copiously sericeous, short-petiolate or 

 sessile; petals purplish, 5 to 6 mm. long; samaras 1.5 to 1.8 cm. wide, often 

 purplish. 



6. Mascag-nia seleriana Loes. Bull. Herb. Boiss. 2:543. 1894. 

 Hiraea parvifiora Rose, Contr. U. S. Nat. Herb. 5: 139. 1897. 

 Mascagnia pringlei Niedenzu, Mascagn. 9. 1908. 

 Veracruz, Puebla, and Oaxaca ; type from Mitla, Oaxaca. 



Erect or scandent shrub ; leaves densely pubescent, rounded or subcordate at 

 base, short-petiolate ; petals violet, 5 to 8 mm. long ; samaras 1.3 to 2 cm. wide. 

 " Maxocotl," " maxoetl " (Oaxaca). 



7. Mascagnia gouania Small, N. Amer. Fl. 25: 120. 1910. 

 Morelos ; type from Jojntla. 



Scandent shrub ; leaves ovate to rounded-ovate, 4 to 7 cm. long, acute or 

 abruptly aciunlnate, long-petiolate ; petals purplish, 5 to 6.5 cm. long ; samaras 

 2.5 to 3 cm. wide. 



8. Mascagnia polybotrya (Juss.) Niedenzu in Engl. & Prantl, Pflanzenfam. 



3': 5G. 1890. 

 Hiraea polybotrya Juss. Ann. Sci. Nat. II. 13: 2G0. 1840. 

 f Hiraea spicigcra Turcz. Bull. Soc. Nat. Moscou 36' : 584. 1863. 

 Puebla and Oaxaca. 



Leaves 2.5 to 5 cm. long, rounded or subcordate at base, short-petiolate ; 

 petals blue. 



No material seen by the writer ; perhaps the same as M. gouania. 



12. JANUSIA Juss. Ann. Sci. Nat. II. 13: 250. 1840. 



Slender scandent shrubs ; leaves small, opposite, short-petiolate, entire ; 

 flowers small, yellow, solitary or in axillary clusters, the petals undulate ; 

 fruit of 2 or 3 samaras. 



Leaves linear or narrowly lanceolate 1. J. gracilis. 



Leaves ovate or oval 2. J. calif ornica. 



1. Janusia gracilis A. Gray, PI. Wright. 1: 37. 1852. 



Dry hillsides, Baja California to Coahuila. Western Texas to southern 

 Arizona ; type collected near El Paso, Texas. 



Leaves 1 to 3 cm. long, strigose, especially beneath ; larger petals 4 to 5 

 mm. long; samaras 9 to 12 mm. long. 



2. Janusia californica Benth. Bot. Voy. Sulph. 8. 1844. 



Dry hillsides, Baja California, Sonora, and Sinaloa ; type from Magdalena 

 Bay, Baja California. 



Leaves 1.5 to 4 cm. long, rounded or obtuse at apex, thinly strigose, often 

 subcordate at base ; samaras 9 to 12 mm. long, often tinged with red. 



13. ASPIC ARPA Rich. Mem. Mus. Hist. Nat. 2: 396. 1815. 



Slender shrubs with erect or reclining stems ; leaves opposite, entire, sessile 

 or short-petiolate ; flowers of two kinds, the petaliferous in mostly terminal 

 clusters, with fimbriate petals, the cleistogamous sessile in the lower axils or 

 on long axillary peduncles; fruit of 2 crested nutlets. 



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