772 CONTRIBUTIONS FEOM THE NATIONAL HERBAHIUM. 



5. Malache chiapensis Standi., sp. nov. 



Type from Jiquipilas, Chiapas {Goldman 1037; U. S. Nat. Herb. no. 470832). 



Shrub, the branches densely tomentose and somewhat viscid ; leaves on long 

 or short petioles, ovate-cordate, 2 to 4.5 cm. long, acute, crenate-dentate, densely- 

 stellate-tomentose, the basal lobes usually overlapping ; flowers axillary, long- 

 pedicellate ; bractlets usually 6, stellate-tomentose ; petals yellow, 2 cm. long ; 

 carpels scabrous, somewhat rugose on the back. 



6. Malache nepetaefolia Standi., sp. nov. 



Coahuila and San Luis Potosi ; type from General Cepeda, Coahuila {Prmgle 

 13698; U. S. Nat. Herb. no. 462390). 



Shrub, the branches finely stellate-pubescent ; leaves slender-petiolate, del- 

 toid-cordate or deltoid-oblong, 1.5 to 3.5 cm. long, obtuse, deeply cordate at 

 base, coarsely crenate or near the base crenate-lobate, rather thinly stellate- 

 pilosulous ; flowers axillary, slender-pedicellate ; bractlets usually 6, acute, 

 stellate-pubescent ; petals 12 to 14 mm. long ; fruit deeply lobed, the carpels 

 lightly coherent, indehiscent, flnely pubescent, 



7. Malache lasiopetala (Scheele) Kuntze, Rev. Gen. PI. 1: 70. 1891. 

 PavovAa lasiopetala Scheele, Linnaea 21: 470. 1848. 



Pavonia vyrightli A. Gray, Gen. Fl. Amer. 2: 76. pi. 130. 1849. 



Coahuila and Nuevo Leon ; reported from Hidalgo. Western Texas ; type 

 from Texas. 



Shrub, tlie branchlets pilosulous; leaves broadly cordate, 3 to 6 cm. long, 

 acute, often angulate, coarsely serrate or dentate, stellate-pilose beneath ; flow- 

 ers axillary, long-pedicellate ; petals rose-purple, about 2 cm. long ; cai*pels 

 glabrous. 



8. Malache melanommata (Robins. & Seat.) Standi. 



Pavonia melanommata Robins. & Seat. Proc. Amer. Acad. 28: 104. 1893. 



Michoacan, Guerrero, and Morelos ; type from Monte Leon, Michoaciin. 



Slender shrub, 1 to 2.5 meters high, the branches finely viscid-pubescent, 

 leaves long-petiolate, ovate or lance-ovate, 5 to 12 cm. long, long-acuminate, 

 cordate at base, crenate, often shallowly trilobate, minutely stellate-pubescent ; 

 flowers chiefly axillary, long-pedicellate; petals 2 to 2.5 cm. long, pink, with 

 dark center. 



9. Malache paniculata (Cav.) Kuntze, Rev. Gen. PI. 1: 70. 1891. 

 Pavonia paniculata Cav. Monad. Diss. 3: 135. pi. ^6, f. 2. 1787. 

 Pavonia mexicana H. B. K. Nov. Gen. & Sp. 5: 284. 1821. 



1 Pavonia scahra Presl, Rel. Haenk. 2: 129. 1836. 



Veracruz. West Indies, Central America, and South America. 



Shrub, 1 to 3 meters high, the branches viscid-pubescent and often hirsute; 

 leaves ovate-cordate, 5 to 12 cm. long, acute or acuminate, often trilobate, 

 crenate or serrate ; flowers mostly paniculate ; petals yellow, about 1.5 cm. 

 long, pilose within at base. 



10. Malache purpusii (T. S. Brandeg.) Standi. 

 Pavonia purpusii T. S. Brandeg. Zoe 5: 250. 1908. 



Pavonia lieljmannii Ulbrich, Rei)ert. Sp. Nov. Fedde 13: 516. 1915. 



Veracruz and Oaxaca ; type from Zacupan, Veracruz. Guatemala. 



Slender shrub, the branches viscid-tomentose and hirsute ; leaves ovate- 

 cordate, 3 to 12 cm. long, acute or acuminate, dentate ; flowers axillary, long- 

 pedicellate; petals purplish, 1.5 to 2 cm. long. 



DOUBTFUL SPECIES. 

 It would be possible to key out some of the species listed below by the 

 characters given in the original descriptions, but the writer has seen no 



