STANDLEY TREES AND SHRUBS OF MEXICO. 801 



tate, thin, green, minutely stellate-pubescent; flower clusters dense, mostly 

 sessile; calyx 4 to 4.5 mm. long, the lobes short, narrowly triangular, acute, 

 minutely tomentose ; petals much shorter than the calyx ; filaments free above ; 

 capsule Icculicidal. 



Collected also at Yautepec, Morelos, by Pringle (no. 9691). 



7. Waltheria conzattii Standi,, sp. nov. 



Type from Salina Cruz, Oaxaca, altitude 50 meters (ConzatU 3682; U. S. 

 Nat. Herb. no. 989568). 



Shrub ; leaves long-petiolate, rounded-ovate or rhombic-ovate, 3 to 8 cm. 

 long, obtuse, rounded or shallowly cordate at base, crenate-dentate, thick, 

 densely velvety-tomentose ; flower clusters loose, few-flowered, short-peduncu- 

 late ; calyx 6 mm, long, velutinous-tomentose, the lobes half as long as the tube, 

 narrowly triangular, acute ; petals nearly as long as the calyx ; filaments united 

 for less than half their length. 



8. Waltheria americana L. Sp. PI. 673. 1753. 

 Waltheria indica L. Sp. PL 673. 1753. 

 Waltheria detonsa A. Gray, PI. Wright. 2: 24. 1853. 



Nearly throughout Mexico. Widely distributed in the warmer parts of both 

 hemispheres. 



Shrub, sometimes 2.5 meters high, or often herbaceous, frequently decum- 

 bent ; leaves on long or short petioles, oblong to rounded-ovate, obtuse to 

 rounded at apex, obtuse to subcordate at base, crenate-dentate, usually thick 

 and densely tomentose, but the pubescence variable in amount and quality ; 

 flower clusters usually dense, sessile or often long-pedunculate ; petals yellow, 

 longer than the calyx. " Malva " (Sinaloa) ; '* malva del monte " (Yucatan) ; 

 " hierba del soldado " (Tamaulipas) ; "malva blanca " (Cuba); " basora 

 prieta," " malvavisco " (Porto Rico) ; " bret6nica " (Venezuela). 



The flowers are sweet-scented. The plant is mucilaginous and emollient, and 

 febrifuge and antisyphilitic properties have been ascribed to it. In Tamaulipas 

 a decoction is employed as a remedy for eruptions of the skin, and in Colima 

 the decoction is used to wash wounds. The plant is said to possess seme forage 

 value. 



9. Waltheria hirsuta Presl, Rel. Haenk. 2: 152. 1836. 

 Described from western Mexico. 



Leaves ovate-cordate, acute, obtusely dentate, whitish-toaientose beneath, 

 about 3.5 cm. long ; flower clusters, long-pedunculate ; petals exserted. 

 No material referable to this species has been seen by the writer. 



10. Waltheria acapulcensis Rose, C'ontr. U. S, Nat. Herb. 5: 184. 1899. 

 Known only from the type locality, Acapulco, Guerrero. 



Leaves slender-petiolate, oblong or oblong-ovate, 2.5 to 6 cm. long, rounded 

 or cordate at base, green, stellate-pubescent ; flower clusters small, mostly 

 pedunculate ; calyx 3 to 4 mm. long ; petals yellow, exserted. 



7, PHYSODIUM Presl, Rel. Haenk. 2: 150. 1836. 



Shrubs or small ^trees ; flowers cymose-paniculate. terminal ; calyx campanu- 

 late, 5-dentate, 5-angulate, accrescent, inflated, reticulate-veined ; petals 5 ; 

 stamen column dividing above into 5 short filaments; capsule small, stipitate, 

 included in the calyx, luculicidally 5-valvate, the cells 1-seeded. 



Pubescence not glandular; petals exserted from the calyx 1. P. dubium. 



Pubescence of the inflorescence chiefly of gland-tipped hairs; petals Included. 



2. P. corymbosum. 



7808—23 19 



