1054 CONTRIBUTIONS FBOM THE NATIONAL HERBARIUM. 



1. Tibouchina purpusii T. S. Brandeg. Univ. Calif. Publ. Bot. 4: 378. 1913. 

 Hidalgo, Veracruz, and Oaxaca ; type collected in the Sierra Madre between 



Misantla and Naolinco, Veracruz. 



Branches densely setose ; leaves ovate or oblong-ovate, 3 to 5 cm. long, 

 acuminate, setose, serrulate ; flowers in small panicles ; calyx tube 5 mm. 

 long, the lobes sliorter, linear-lanceolate ; petals pink, about 1 cm. long. 



2. Tibouchina g'aleottiana (Naud.) Cogn. in DC. Monogr. Phan. 7: 258. 1891. 

 Oreocosmus galeottianus Naud. Ann. Sci. Nat. III. 13: 38. 1850. 



Pleroma galeottianum Triana, Trans. Linn. Soc. Bot. 28: 46. 1871. 



Type collected between Tampico, Tamaulipas, and Real del Monte, Hidalgo. 



Stems chiefly herbaceous, 20 to 40 cm. high ; leaves oblong-lanceolate, 5- 

 nerved, 2 to 4 cm. long, serrulate, setulose beneath along the nerves; calyx 

 tube 5 to 6 mm. long, the lobes 8 to 4 mm. long, subobtuse. 



3. Tibouchina durangensis Standi., sp. nov. 



T.vpe from San Ramon, Durango (Palmer 163; U. S. Nat. Herb. no. 571184). 



Stems quadrangular, when young covered with very short thick appressed 

 hairs ; leaves ovate or ovate-oblong, 3 to 7 cm. long, 1.2 to 3 cm. wide, acute 

 or acuminate, rounded at base, 5-nerved, serrulate, setulose-scabrous, deep 

 green above, pale beneath ; flowers in few-flowered terminal panicles ; calyx 

 tube 7 mm. long, thinly glandular-setulose with short stout purplish hairs, the 

 lobes oblong-triangular, acute or obtuse, 2.5 to 3 mm. long; petals pxirple. 

 about 1 cm. long; stamens very unequal, the larger anthers subulate, 7 to S 

 mm. long, the connective produced below into a stipe 5 mm. long, the smaller 

 anthers 5 mm. long. 



4. Tibouchina rufipilis (Schlecht.) Cogn. in DC. Monogr. Phan. 7: 259. 1891. 

 Rhexia rufipilis Schlecht. Linnaea 13: 430. 1839. 



Pleroma rufipile Triana, Trans. Linn. Soc. Bot. 28: 46. 1871. 



Veracruz ; type from Monte Macultepec, Jalapa. 



Slender shrub, the stems rufous-setose; leaves oblong-lanceolate, 3 to 8 cm. 

 long, acuminate, 5-nerved, serrulate, setulose ; flowers mostly in 3-flowered 

 cymes ; calyx tube 6 mm. long, setose, the lobes linear-spatulate, 8 to 9 mm. 

 long; petals pink, 1.5 cm. long. 



5. Tibouchina mexicana (D. Don) Cogn. in DC. Monogr. Phan. 7: 258. 1891. 

 Melastoma mexicana D. Don, Mem. Wern. Soc. 4: 290. 1823. 



Rhexia tortuosa Humb. & Bonpl. Monogr. Melast. 2: 17. pi. 7. 1823. 



Pleroma mexicamim DC. Prodr. 3: 152. 1828. 



Sinaloa to Oaxaca and Veracruz. 



Shrub, 1 meter high or less, the branches setose-strigose ; leaves lanceolate 

 or linear-lanceolate, 1 to 6 cm. long, attenuate, 3-nerved, entire or serrulate, 

 setulose ; flowers solitary or cymose ; lobes of the calyx about as long as the 

 tube ; petals 1 cm. long, white or pink. 



6. Tibouchina bourgaeana Cogn. in DC. Monogr. Phnn. 7: 204. 1S01. 

 Tibouchina aliena T. S. Brandeg. Univ. Calif. Publ. Bot. 6: 58. 1914. 



Tepic to Veracruz and Chiapas ; type from Valley of Cordoba, Veracruz. 

 Central America. 



Shrub, 1.5 meters high or less, the bi-anches setose-strigose; leaves lanceo- 

 late or lance-oblong, 4 to 11 cm. long, attenuate, 5-nerved, serrulate, appx-essed- 

 .seto'je; ffowers numerous, in dense or lax cymes; calyx tube 2.5 to 4 mm. long, 



