432 SAPINDACE.E. 



Viir. heptaphylla, Gray, n. comb. Leaflets smaller, mostly 6 or 7, generally very 

 strongly toot lied or iucised, the fruit clusters more or less peudulous. — .1. hejituphylla, 

 Buckley, Troc. Acad, riiilad.^1861, 430, 1870, 136. — Texas. 



Var. pubescens, Bailey, u. comb. Leaflets grayish-pubesceut below, mostly bluntly 

 toothed, and intlorcscence elongated. — ,!, pubesa'ns, Schlect. Liunaja, x. 251. Vitis pubes- 

 cens. Mill. Auu. i\Ius. Hot. Lugd.-Bat. i. 90. — Uccurs iu ISortheru Me.\.ico, aud probably iu 

 our southwestern territory. 



Order XLIV. SAPINDACEiE. 



By B. L. Koiunson. 



Trees, shrubs (very rarely herbs), or in warm countries lianas. Flowers regu- 

 lar or zygomorphous, in Suborder I perfect, iu the other suborders often appear- 

 in*' perfect or polygamous, yet generally through reduction or suppression of one 

 set of essential organs, monoecious or (in Dodonoea and rarely in Acer) dioecious. 

 Calyx inferior, mostly (4-)5-parted or -divided; segments or sepals imbricated or 

 rarely valvate in bud. Petals in regular flowers usually 5, in zygomorphous 4 

 (the posterior obsolete). Disk annular, crenate, or lobed, often glandular, in 

 Dodontva and sometimes in Acer obsolete. Stamens usually 8 or 10 (4 to oc), 

 hypogynous or sometimes somewhat perigynous, mostly inserted within or upon 

 (sometimes on the outer edge of) the disk ; anthers introrse, 2-celled, dehiscent 

 by longitudinal slits ; filaments usually pubescent. Style simple or more or less 

 deeply 2-3(-4)-cleft or -divided ; ovary few (mostly 2-3)-celled ; ovules solitary, 

 geminate, or rarely more numerous in the cells, usually attached to the axis and 

 ascending with rhaphe ventral. — A large and, as here taken, somewhat composite 

 order. The principal and more typical suborder {Sapindecc) is chiefly tropical 

 and includes a large number of genera, most of which are small or even mono- 

 typic. Two considerable genera, Serjania and Paullinia, woody climbers of 

 Tropical America are noteworthy for the variety and complexity in the structure 

 of their stems. 

 SuBOKDER 1. STAPHYLINE^E. Flowers perfect, regular. Sepals, petals, and 



stamens of the same number. Fruit (iu ours) capsular, vesicular-inflated ; seeds 



albuuiinous, several in each cell. 



1. STAPHYLEA. Sepals concolorous with the petals, oblong, erect, imbricated in the bud. 

 Disk fleshy. Carpels (2 to) 3; styles slender; stigmas capitate or snbcapitate. Fruit 

 bladder-like, with (2-)3-horned summit; seeds several and nearly horizontal, biseriately 

 arranged along the inner angle of each cell. 



Suborder IT. ACERIXE^E. Flowers regular, polygamous, andromonoecious or 

 androdioecious or (in Acer § Negnndo) dioecious. Petals (often wanting), when 

 present, as many as the sepals. Fruit normally of 2 diverging carpellary sama- 

 roid more or less coherent nutlets, or (in certain foreign species) capsular with two 

 samaroid valves. Trees and erect shrubs with opposite leaves. 



2. ACER. Flowers polygamo-dicecious or dioecious, in lateral or terminal umbellate, race- 

 mose, or paniculate inflorescences. Petals usually about 5 and isomerous with the calyx- 

 lobes or wanting. Stamens more often anisomerous, in 9 flowers reduced or (in § Negnndo) 

 wanting. Disk either intra- or extra-stamineal, or bearing the stamens, mostly creuate or 



