131(130). Flowers usually uniformly 5-merous; stamens 10 to 40, inserted near 

 the rim of the floral cup not very far from where the petals are 

 inserted; stipules present 73. Rosaceae, p. 1015 



131. Flowers 4- to 7-merous; stamens 4 to numerous, usually inserted well down 



into the calyx tube or floral cup, whereas the petals are inserted 

 near the rim between the short calyx teeth; stipules minute or 

 usually absent 93. Lythraceae, p. 1154 



132(128). Shrubs or trees with numerous twigs and very numerous alternate 

 scalelike or nearly terete leaves only about 1 mm. long, the entire 

 plant often appearing grayish; flowers pink or white, very small, 

 inconspicuous 91. Tamaricaceae, p. 1148 



132. Character combination not as above (133) 



133(132). Leaves opposite, simple and gland-dotted (as seen with transmitted 

 light); styles often separate or nearly so or only lightly cohering 

 until after anthesis; mostly herbs or weak-stemmed shrubs; sepals, 

 petals and stamens free and hypogynous or stamens in 5 phalanges 

 opposite the petals; placentae parietal or usually axile; ovules 

 usually numerous; fruit a capsule; stamens 6 to numerous, when 



numerous tending to be in as many groups as there are petals 



89. Hypericaceae, p. 1127 



133. Character combination not as above but if most of the characters are similar 



then the leaves mostly alternate or the styles permanently united 

 (134) 



134(133). Shrubs or small trees of eastern Texas; flowers usually white, in 

 elongate racemes usually 5-20 cm. long and only 1 cm. thick (135) 



134. Habit various but if flowers in elongate racemes then plants herbaceous 



(136) 



135(134). Fruit dehiscent... 100. Clethraceae, p. 1267 



135. Fruit indehi&cent 81. Cyrillaceae, p. 1095 



136(134). Fruit indehiscent and usually fleshy, usually 1-seeded (137) 



136. Fruit dehiscent, usually dry at maturity (138) 



137(136). Leaves simple, usually stipulate; stamens never more numerous than 

 petals; drupes usually nearly circular in transection, not resinous, 

 usually glabrous 82. Aquifoliaceae, p. 1097 



137. Leaves usually compound, usually exstipulate; stamens as many as or rarely 



twice as many as the petals; drupes usually somewhat flattened, 

 resinous, often pubescent 80. Anacardiaceae, p. 1091 



138(136). Flowers with thick-lobed disk that fills the bottom gf the calyx and 

 sometimes hides much of the ovary; plants woody, with 4 sided 

 green-barked branchlets; seeds with bright-red arils (genus Euony- 

 mus of) 83. Celastraceae, p. 1103 



138. Disk (if present) not so thick; plants various in habit but usually mostly 



herbaceous in texture; seeds not with bright-red arils 



90. Elatinaceae, p. 1 142 



35 



