152 NORTH AMERICAN FLORA [VOLUME 25 



petioles each bearing 2 glands ; panicles rather closely many-flowered, the rachis glabrous; 

 sepals oblong, about 3 mm. long, usually minutely pubescent ; corolla apparently yellow 

 or orange, the larger petals 6-6.5 mm. long, the blades oblong ; capsules not seen. 



Type collected at Rosario, Sinaloa, Mexico, January, 1895, Frank H. Lamb 470 (herb. N. Y. 

 Bot. Card.). 



Distribution : Sinaloa. 



7. Thryallis tuberculata Rose, Contr. U. S. Nat. Herb. 

 12: 281. 1909. 

 Plants with elongate muricate branches ; leaf-blades oblong to oblong-lanceolate, 2.5-5 

 cm. long, obtuse or acute, glabrous, except the midrib beneath, somewhat glaucous beneath, 

 acute, often cuneate at the base, short-petioled ; panicles rather short, usually simple, the 

 rachis muricate-pubescent ; sepals oblong to lanceolate, 3-3.5 mm. long, glabrous; corolla 

 yellow, the larger petals 9-10 mm. long, the blades ovate ; capsules not seen. 



Type locality: Between Rosario and Colomas, Sinaloa. 

 Distribution : Known only from the type locality. 



8. Thryallis angustifolia (Benth.) Kuntze, Rev. Gen. 1 : 89. 1891. 



Galphimia angustifolia Benth. Bot. Voy. Sulph. 9 : 1844. 



Galphimia linifolia A. Gray, Gen. 111. 2 : 196. 1849. 



Galphimia linifolia oblongifolia A. Gray, PI. Wright. 1 : 36. 1852. 



Galphimia angustifolia oblongifolia S. Wats. Proc. Am. Acad. 24: 42. 1889. 



Thryallis linifolia Kuntze, Rev. Gen. 1 : 89. 1891. 



Thryallis angustifolia oblongifolia Vail, Bull. Torrey Club 22 : 228. 1895. 



Plants with tufted usually strigose stems and branches ; leaf-blades linear or lanceolate, 

 or those of the lower leaves sometimes ovate, oblong, or oval, mostly 1-4 cm. long, acute 

 or abruptly pointed or obtuse, with 2 glands near the base, paler beneath than above, short- 

 petioled ; panicles loosely few-flowered, the rachis strigillose ; sepals oblong to lanceolate, 

 3-4 mm. long ; corolla yellow, turning reddish, the larger petals 4-5 mm. long, the blades 

 triangular-ovate to oblong-ovate ; capsules 3-4 mm. long, the faces slightly wrinkled ; seeds 

 about 1.5 mm. long, shining. 



Type locality : Cape San Lucas, Lower California. 



Distribution : Texas and northern Mexico. 



Illustrations: Benth. Bot. Voy. Sulph. pi. 5; A. Gray, Gen. 111. pi. 173. 



9. Thryallis vestita (S. Wats.) Rose, Contr. U. S. Nat. 

 Herb. 12 : 281. 1909. 



Galphimia vestita S. Wats. Proc. Am. Acad. 21 : 421. 1886. 



Plants with several or many tufted hirsute stems 1-3 dm. tall, the branches relatively 

 long ; leaf-blades linear to narrowly linear-lanceolate, 1-3.5 cm. long, acuminate, densely 

 woolly-hirsute, sessile or nearly so ; panicles short, few-flowered; sepals lanceolate, 6-8 mm. 

 long, hirsute, acute; corolla yellow, the larger petals 11-12 mm. long, the blades oblong- 

 ovate, crenulate, apiculate ; capsules not seen. 



Type locality : Southwestern Chihuahua. 

 Distribution : Known only from the type locality. 



20. MALPIGHIA (Plunder) I,. Sp. PI. 425. 1753. 



Shrubs or small trees, with glabrous, softly pubescent, or coarsely pubescent foliage. 

 Leaves opposite, glabrous, softly or coarsely pubescent, with the hairs sometimes stinging ; 

 blades narrow or broad, entire or spiny-toothed, usualh* petioled. Flowers in peduncled 

 axillary contracted cymes. Calyx with 6-10 glands, persistent, scarcely accrescent, the 

 glands large, sessile. Corolla red, pink, or white ; petals 5, the blades undulate, toothed, or 

 fimbriate, sometimes concave or keeled. Stamens 10, all anther-bearing ; filaments rather 

 long, united to the middle or below it, glabrous ; anthers short, often didymous, the con- 

 nective usually inconspicuous. Ovary 3-lobed, glabrous. Styles distinct, often thickened 

 upward. Stigmas inconspicuous. Drupe depressed or slightly elongate, usually red or 

 orange. 



Type species, Malpighia glabra L. 



