STANDLEY TREES AND SHRUBS OF MEXICO. 773 



material which certainly belongs to them, and it may be that some of the 

 names are referable to other genera. 



Pavonia glandulosa Presl, Rel. Haenk. 2: 129. 1836. Type from western 

 Mexico. 



Pavonia hetekophylla Turcz. Bull. Soc. Nat. Moscou 31': 189. 1858. 



Pavonia hiktifloea Benth. PI. Hartw. 7. 1839. Type from Aguascalientes. 



Pavonia kacemifloka Hook. & Arn. Bot. Beechey Voy. 277. 1836-39. Type 

 from Tepic. 



Pavonia ukticaefolia Presl, Rel. Haenk. 2: 128. 1836. Type from western 

 Mexico. 



15. MALVAVISCUS Cav. Monad. Diss. 131. 1780. 



Shrubs or trees ; leaves toothed, often lobed or angled ; flowers usualy red, 

 pedunculate, axillary or racemose ; bractlets numerous ; petals erect-connivent, 

 or spreading only above ; fruit 5-celled, the carpels baccate, indehiscent, 

 1-seeded. 



The differences between most of the species are poorly marked, and most 

 of the characters are so variable that there is much doubt as to which ones 

 are of systematic valvre. The following treatment is not wholly satisfactory, 

 but the writer is uncertain whether the number of recognized species should 

 be increased or decreased. 



Various species of Malvaviscus are cultivated in Mexico and elsewhere for 

 their showy flowers. Among gardeners they are fi-equently known by the 

 generic name Achania. The bark contains a tough fiber. A decoction of the 

 flowers is employed in Mexico for inflammation of the digestive tract, and in 

 popular practice as an emmenagogue. The plants have the emollient properties 

 characteristic of the family. 



One of the species is figured by Hernandez,' without name or description. 

 Another one, apparently, is illustrated and described ^ in a chapter headed 

 " De Atlat Zopillin, seu aquosa herba appensa." 



Corolla 7 to 8 cm. long 1. M. candidus. 



Corolla less than 6 cm. long. 



Leaves glabrous beneath, or the pubescence of separated, simple or stellate 

 hairs. 

 Corolla 4 to 5 cm. long. 



Bractlets linear, glabrous 2. M. penduliflorus. 



Bractlets broadened above, ciliate and usually stellate-pubescent. 



3. M. conzattii. 

 Corolla 2 to 3.5 cm. long. 



Pubescence of the upper surface of the leaf almost wholly of simple 



hairs 4. M. rivularis. 



Pubescence of the leaves wholly or chiefly of stellate hairs. 

 Leaves minutely stellate-pubescent beneath along the nerves. Leaves 

 usually as broad as long, deeply cordate at base. 



5. M. drummondii. 

 Leaves coarsely stellate-pubescent along the nerves or hirtellous. 

 Leaves mostly 3 to 5-lobate, usually 5 to 14 cm. wide. 



6. M. populifolius. 

 Leaves usually not lobate, mostly 1 to 5 cm. wide. 



7. M. grandifl.orus. 



' Thesaurus 352. 1651. 

 * Thesaurus 117. 1651. 



