748 CONTEIBUTIONS FEOM THE NATIONAL HERBARIUM. 



Low shrub ; leaves rounded or obtuse at apex, crenate, finely stellate- 

 tomentose ; flowers in naked panicles ; petals yellow, 7 to 8 mm. long ; carpels- 

 6 to 8, 1-seeded. 



2. Horsfordia newberryi (S. Wats.) A Gray, Proc Amer. Acad. 22: 297. 1887. 

 Abutilon netvherryi S. Wats. Proc. Amer. Acad. 11: 125. 1876. 



Sonora and Baja California. Southern Arizona and California ; type col- 

 lected on the lower Colorado River. 



Shrub, 1 to 2.5 meters high, covered throughout with a very fine dense 

 yellowish stellate tomentum ; leaves attenuate, rounded or cordate at base,, 

 very thick, subentire ; petals yellow, 8 mm. long ; carpels 8 or 9. 



3. Horsfordia alata (S. Wats.) A. Gray, Proc. Amer. Acad. 22: 297. 1887. 

 Sida alata S. Wats. Proc. Amer. Acad. 20: 356 1885. 



Horsfordia palmeri S. Wats. Proc. Amer. Acad. 24: 40. 1889. 



Sonora and Baja California ; type from northwestern Sonora. 



Shrub, 1 to 3.5 meters high ; leaves obtuse or acute, dentate or subentire, 

 densely stellate-tomentose with somewhat viscid pubescence ; petals pink, 1 

 to 1.5 cm. long; carpels 10 to 12. " Malva blanca " (Baja California). 



3. NEOBRITTONIA Hochr. Ann. Cons. Jard. Bot. Geneve 9: 184. 1905. 



The following is the only species known. 



1. Neobrittonia acerifolia (Lag.) Hochr. Ann. Cons. Jard. Bot. GenSve 9: 184. 

 1905. 



Sida acerifolia Lag. Gen. & Sp. Nov. 21. 1816. 



Abutilon acerifolium Don, Hist. Dichl. PI. 1: 504. 1831. 



Sida discissa Bertol. Mem. Soc. Ital. Moden. 23: 305. 1844. 



Aiutilon discissum Schlecht. Linnaoa 25: 218. 1852. 



Morelos, Guatemala ; described from cultivated plants. 



Plants 2 to 8 meters high, the stems pilose with very long soft spreading 

 hairs ; leaves 6 to 20 cm. long, deeply cordate at base, deeply 3 or 5-lobed, 

 green, thinly pilose; flowers axillary; petals orbicular, 2 cm. long, lilac-violet; 

 carpels numerous, 2 cm. long, rounded at apex, stellate-hirsute, each with 2 

 retrorse spines below. 



4. ABUTILON Adans. Fam. PI. 2: 398. 1763. 



Herbs, shrubs, or small trees ; leaves usually cordate ; flowers small or 

 large, variously colored; calyx without bractlets; carpels of the fruit 4 to 

 many, 2 to several -seeded, bivalvate. 



Ovules 4 or more in each cell ; flowers mostly large, usually 3 to 5 cm. long. 



Leaves deeply lobed 1. A. striatum. 



Leaves not lobed. 



Petals 1.5 cm. long or less ; upper leaves sessile 2. A. amplexifolium. 



Petals 2 to 5 cm. long; upper leaves i)etiolate. 



Leaves crenate-dentate 3. A. purpusii. 



Leaves entire. 



Calyx 1.7 cm. long or shorter. 



Calyx 8 to 10 mm. long, the lobes triangular 4. A. bakerianum. 



Calyx 13 to 17 mm. long, the lobes narrowly triangular or triangular- 

 lanceolate 5. A. peyritscMi. 



Calyx 2 cm. long or more, usually fully 2.5 cm. long. 



Carpels broadly winged on the back 6. A. notolophium. 



Carpels not winged 7, A. yucatanum. 



