784 CONTRIBUTIONS FROM THE NATIONAL, HERBARIUM. 



Shrub; leaves cordate at base, 3-lobed to about the middle, 8 to 13 cm. 

 long, glabrous except along the veins; the lobes ovate-lanceolate, very long- 

 acuminate ; bractlets ovate-cordate, acute, entire, covered with large purple 

 dotlike glands; calyx 8 to 9 mm. long, purple-dotted; petals 5 to 5.5 cm. long, 

 purplish when dry. 



In a general way the specimens agree with a tracing of the plate which 

 served as the basis of De CandoUe's description of Ingenhouzia triloba} The 

 writer feels convinced, however, that the two plants are different. The identi- 

 fication of Ingenhouzia is still uncertain, and it may well be that the plant 

 has never been recollected. By many authors it has been held to be the same 

 as ThurheHa thespesioides A. Gray, but that view is undoubtedly incorrect. 



2. Gossypium davidsonii Kellogg, Proc. Calif. Acad. 5: 82. 1873. 

 Southern Baja California and western Sonora, 



Shrub, 1 to 2.5 meters high; leaves broadly ovate-cordate, 2.5 to 6.5 cm. 

 long, acute or acuminate, rarely shallowly trilobate; petals 3 to 3.5 cm. long, 

 bright yellow, with purple claws ; bractlets densely stellate-pubescent. 



Watt states that this is probably identical with O. klotzschianum Anderss., 

 a native of the Galapagos Islands. 



3. Gossypium harknessii T. S. Brundeg. Proc. Calif. Acad. TI. 2: 136. 1889. 

 Ingenhouzia harknessii Rose, U. S. Dept. Agr. Bur. PI. Ind. Bull. 131: 54. 



1908. 



Baja California ; type from Santa Margarita Island. 



Shrub, 0.5 to 2 meters high, forming dense rounded clumps ; leaves reni- 

 form or broadly cordate, 1.5 to 5 cm. long, acute, deeply cordate at base, 

 shallowly trilobate, glabrous except when very young; bractlets broadly ovate, 

 acuminate; petals 2.5 to 3 cm. long, sulphur-yellow, with purple claws; fruit 

 3-celled, the cells 4-seeded. 



4. Gossypium barbadense L. Sp. PL 693. 1753. 



Cultivated and sometimes growing wild; specimens seen from Veracruz, 

 Jalisco, Sinaloa, and Baja California. Widely cultivated in warm regions. 



Plants herbaceous or often becoming fruticose; leaves 7 to 13 cm. long, 

 cordate at base, 3 or 5-lobed, the lobes acute or acuminate, ascending or 

 spreading, glabrous or nearly so; bractlets f I'ee ; petals pale yellow, tinged 

 with purple, about 5.5 cm. long; seeds covered with long white cotton. 



This species includes most of the cultivated forms of sea-island and other 

 long-staple cottons. 



5. Gossypium lanceolatum Tod. Rel. Cult. Cot. 185. pi. 5, f. 1. 1877-78. 

 Described from wild Mexican plants. 



Leaves lanceolate, acuminate, pinnate-nerved; bracelets large, ovate, deeply 

 cordate, deeply toothed above, exceeding the corolla. 

 The plant is known only from the data afforded by the original description. 



6. Gossypium palmerii Watt, Wild & Cult. Cotton 204. pi. SJt. 1907. 

 Knovra only from the type locality, Acapulco, Guerrero. 



Shrub with dark red branches; leaves mostly trilobate but partly entire, 

 the lobes narrowly oblong, long-acuminate, glabrous or nearly so; pedicels 

 with 3 large glands at apex; bractlets with glands within at base; petals 

 pale yellow; seeds covered with green fuzz and long white cotton. 



Gossypium frutictilostim Tod.' may be a form of the same species. It was 

 described from Mexico. 



DC. Prodr. 1: 474. 1824. 

 ' Rel. Cult. Cot. 187. pi. 12, f. 3. 1877-78. 



