STANDLEY TREES AND SHRUBS OF MEXICO. 799 



1. Hermannia inflata Link & Otto, Icon. PI. Ear. 55. pi. 28. 1828. 

 Puebla and Oaxaca. 



Shrub 1 to 2 meters high, densely stellate-pubescent throughout; leaves 

 short-petiolate, rhombic-ovate, 2 to 6 cm. long, acute to rounded at apex, 

 rounded at base, crenate-dentate ; flowers subracemose, short-pedicellate, soli- 

 tary in the upper axils; petals about 1 cm. long; calyx in fruit 1 cm. long, 

 purplish ; capsule 10 to 12 mm. long, densely hairy, the angles unarmed. 



2. Hermannia palmeri Rose, Contr. U. S. Nat. Herb. 1: 67. 1890. 

 Baja California ; type from La Paz. 



Plants low, suffrutescent or herbaceous, densely stellate-pubescent and gland- 

 ular-pubescent ; leaves short-petiolate, 1 to 3 cm. long, rhombic-ovate to rounded- 

 cordate, obtuse or rounded at apex, crenate-dentate ; flowers solitary or cymose ; 

 petals yellow, 8 to 10 mm. long; anthers connivent; capsule 12 mm. long, the 

 spines slender, glochidiate. 



3. Hermannia pauciflora S. Wats. Proc. Amer. Acad. 17: 368. 1882. 



Sonora. Southern Arizona, the type from the Santa Catalina Mountains. 



Plants low, herbaceous, or suffrutescent at base, rather thinly stellate-pu- 

 bescent; leaves slender-petiolate, rhombic-ovate, 1 to 3.5 cm. long, obtuse or 

 rounded at apex, truncate or subcordate at base, dentate; pedicels slender; 

 petals yellow, 8 mm. long; capsule 8 to 12 mm. long, thinly pubescent, the 

 marginal spines very short. 



4. Hermannia texana A. Gray, Gen. Fl. Amer. 2: 88. pi. 1S5. 1849. 



Tamaulipas, Coahuila, Nuevo Leon, and San Luis Potosf. Western Texas. 



Plants herbaceous or suffrutescent, 60 cm. high or less, densely stellate- 

 pubescent ; leaves oblong-ovate to rounded, usually rounded at apex, rounded 

 or subcordate at base, dentate or sinuate-dentate ; petals dull red, 8 mm. long ; 

 capsule 10 to 12 mm. long, densely hairy. 



6. WALTHERIA L. Sp. PI. 673. 1753. 



Reference: Rose, Synopsis of the North American species of Waltheria, 

 Contr. U. S. Nat. Herb. 5: 183-185. 1899. 



Shrubs or herbs, sometimes small trees, the pubescence mostly stellate ; 

 leaves serrate or dentate ; flowers small, glomerate, the glomerules axillary, 

 sessile or pedunculate ; calyx 5-lobate ; petals 5, persistent in fruit ; stamens 



5. the filaments wholly or partially connate ; fruit a 1-seeded capsule. 



The only other Mexican species of the genus, W. operculata Rose, is an an- 

 nual plant with broad stipules, the capsule opening by a lid. In the species 

 listed below the stipules are linear and the capsule is loculicidally dehiscent. 



Leaves long-acuminate, acutely dentate, glabrous or nearly so. 



1. W. acuminata. 

 Leaves acute to rounded at apex, crenate or obtusely dentate. 

 Leaves large, mostly 7 to 15 cm. long, distichous; large shrubs. 



Filaments united to the summit leaves broadly ovate 2. W. brevipes. 



Filaments united only at base ; leaves elliptic-oblong or obovate-oblong. 



3. W. glomerata. 

 Leaves small, mostly 2 to 7 cm. long, not conspicuously if at all distichous; 

 small shrubs or herbs. 

 Lobes of the calyx much shorter than the tube. 



Petals much exceeding the calyx 4. W. preslii. 



Petals not exceeding the calyx. 



Leaves glabrous beneath in age; flowers in large panicles. 



5. W. alamosana. 



