322 CONTRIBUTIONS FEOM THE NATIONAL HERBARIUM. 



Carpels wholly united into a 5-celled capsule; flowers solitary or 

 in small clusters 2. LINDLEYELLA. 



Carpels free above, wholly distinct at maturity ; flowers corymbose. 



3. VAUQUELINIA. 



1. SPIRAEA L. Sp. PI. 489. 1753. 



Many of the species of this genus, especially those of Asiatic origin, are culti- 

 vated for ornament, and some are grown in Mexican gardens. 

 1. Spiraea hartweg-iana Rydb. N. Amer. Fl. 22: 246. 1908. 



Spiraea parvifolia Benth. PI. Hartw. 36. 1840. Not S. parvifolia Raf. 1838. 



Puebla and Oaxaca ; type from " Puenta del Dio." 



Shrub with grayish or reddish brown branches ; leaves spatulate, 7 to 15 mm. 

 long, entire, glabrous ; flowers small, wliite, racemose ; petals 5, 2 mm. long ; fruit 

 of 5 follicles. 



i 



2. LINDLEYELLA Rydb. N. Amer. Fl. 22: 259. 1908. 

 1. Lindleyella mespiloides (H. B. K.) Rydb. N. Amer. Fl. 22: 259. 1908. 



Lindleya mespiloides H. B. K. Nov. Gen. & Sp. 6: 240. 1823. 



LindleyeUa schiedeana Rydb. N. Amer. Fl. 22: 259. 1908. 



Coahuila to Tamaulipas and Oaxaca ; type from between La Puente de la 

 Madre de Dios and Magdalena. 



Shrub, 2 to 3 meters high ; leaves oblanceolate to broadly obovate, 1 to 4 cm. 

 long, short-petiolate, glabrous, crenulate; flowers solitary or clustered, white, 

 2 to 3 cm. broad ; petals 5 ; stamens 15 to 25. " Barreta " (Zacatecas). 



3. VAUQUELINIA Correa ; Humb. & Bonpl. PI. Aequin. 1: 140. 1808. 

 Shrubs or small trees ; leaves coriaceous, serrate or dentate, the stipules small, 

 deciduous ; flowers small, white, corymbose ; petals- 5 ; stamens 15 to 25 ; fruit 

 a woody capsule. 

 Leaves finely tomentose beneath. 



Leaf blades lanceolate or narrowly lanceolate, tapering to the apex, white 



beneath 1. V. californica. 



Leaf blades narrowly oblong, not tapering te the apex, obtuse, greenish be- 

 neath 2. V. australis. 



Leaves glabrous beneath, at least when fully expanded. 

 Leaf blades linear or linear-lanceolate, coarsely salient-dentate, acute or 



attenuate at base 3. V. corymbosa. 



Leaf blades lanceolate, oblong, broadly oblong, or ovate, truncate to acutish 

 at base. 

 Leaf blades 3 to 5 cm. long, 0.6 to 1.1 cm. wide, finely serrulate : petioles 



3 to 6 mm. long; inflorescence few-flowered 4. V. pauciflora. 



Leaf blades 5.5 to 10.5 cm. long, 1.3 to 3 cm. wide, coarsely serrate; petioles 

 6 to 25 mm. long ; inflorescence many-flowered. 

 Leaf blades 3 to 5 times as long as broad, obtuse or acutish at base. 



5. V. karwinskyi. 

 Leaf blades about twice as long as broad, truncate or very obtuse at base. 



6. V. latifolJa. 



1. Vauquelinia californica (Torr. ) Sarg. Gard. & For. 2: 400. 1889. 



Spiraea californica Torr. in Emory, Notes IMil. Reconn. 140. 1848. 



VauqueWUa torreyi S. Wats. Proc. Amer. Acad. 11: 147. 1876. 



Reported from Sonora and Baja California. Arizona ; type from mountains 

 near the Gila. 



