STANDLEY- — TEEES AND SHRUBS OF MEXICO. 1143 



5. BUDDLEIA L. Sp. PI. 112. 1753. 



Shrubs or small trees, usually with stellate tomentum ; leaves entire or 

 toothed ; flowers small, in heads or dense cymes, these solitary and axillary or 

 spicate or paniculate ; calyx campanulate, 4-dentate ; corolla short-salverform, 

 the 4 lobes imbricate, spreading in anthesis; stamens 4; capsule septicidally 

 bivalvate. 



Some of the Old World species have showy flowers and are cultivated for 

 ornament. The leaves of B. tnadagascariensis Lam. were formerly employed 

 in Madagascar as a soap substitute, and the plant is used as a remedy for 

 asthma, coughs, and bronchitis. Some of the members of the genus are said 

 to be used for poisoning fish. The usual Mexican name for all the species 

 is " tepozdn." 



Under the name " topogan," Sahagfm mentions one species which was 

 employed as a diuretic and to " regulate the digestion and moderate the 

 heat of the body." In another place he says : " There is a medicinal tree 

 called tepogan. Its leaves are long, velvety, rounded, and pointed. In color 

 they are somewhat whitish green, and they exhale a leather unpleasant odor. 

 The tree is good for heat of the head in either children or adults. The roots 

 are large and long and have a slightly disagreeable odor. Cut up, pulverized, 

 and mixed with the root of tepexiloxocMtlacotl, they are good to stop nose- 

 bleed." 



Hemsley listed 26 species of Buddleia from Mexico, and others have been 

 described since. Many of them, however, have been based upon trivial char- 

 acters and must be reduced to synonymy. 



Flowers in dense heads, these spicate or racemose or sometimes solitary. 

 Heads distinctly pedunculate. 



Heads mostly terminal and solitary. 



Leaves 1 to 3 cm. long, obtuse or rounded at apex 1. B. marrubiifolia. 



Leaves 4.5 to 6 cm. long, acuminate 2. E. saltillensis. 



Heads axillary, racemose. 



Leaves petiolate, the petioles not dilated at base 3. B. wrightii. 



Leaves sessile, or with dilated clasping petioles. 



Leaves coarsely serrate, contracted into a short petiole, this broadly 



marginate and dilated at base 4. B. chapalana. 



Leaves crenulate, sessile 5. B. perfoliata. 



Heads all or mostly sessile. 



Leaves sessile, never contracted into a winged petiole, small, mostly 1 to 



3 cm. long, narrowly oblong 6. B. scordioides. 



Leaves petiolate, or at least contracted into a winged petiole, mostly 4 

 to 12 cm. long or larger, commonly lanceolate or ovate. 

 Heads 3 to 7-flowered ; leaves obtuse, 7 cm. long or less. 



I 7. B. tuxtlica. 



Heads many-flowered ; leaves acute or acuminate, usually longer. 



8. B. sessiliflora. 

 Flowers in cymes, or capitate but the heads paniculate. 



Leaves rounded or cordate at base, not decurrent. 

 Leaves covered beneath with a minute close whitish tomentum. 



9. B. tom^entella. 

 lieaves covered beneath with a loose floccose brownish tomentum. 



Leaves rounded at apex 10. B. elliptica. 



