432 SAPINDACE^. 



Var. heptaph^lla, Gray, n. comb. Leaflets smaller, mostly 6 or 7, generally very 

 strougly toothed or iucised, the fruit clusters more or less pendulous. — A. heptuphylla, 

 Buckley, Proc. Acad. Philad. 1861, 450, 1870, 136. — Texas. 



Var. pubescens, Bailey, n. comb. Leaflets grayisli-pubesceut below, mostly bluutly 

 toothed, aud iufloresceuce elougated. — .1. pubescens, Schlect. Liuuaia, x. 251. Vitis pubes- 

 cens, Miq. Auu. Mus. Bot. Lugd.-Bat. i. 90. — Occurs iu Northern Mexico, and probably in 

 our southwestern territory. 



Order XLIV. SAPINDACE^. 



By B. L. Robinson. 



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

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

 ing perfect or polygamous, yet generally through reduction or suppression of one 

 set of essential organs, monoecious or (in Bodoncea and rarely in Acer) dicecious. 

 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 

 Dodonma 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 (^Sapindea') is chiefly tropical 

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

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

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

 of their stems. 



Suborder I. STAPHYLINEyE. Flowers perfect, regular. Sepals, petals, and 

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

 albuminous, several in each cell. 



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

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

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

 arranged along the inner angle of each cell. 



Suborder IL ACERINEiE. Flowers regular, polygamous, andromonoecious or 

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

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

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

 samaroid valves. Trees and erect shrubs with opposite leaves. 



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

 mose, or paniculate inflorescences. Petals nsnally about 5 and isnmerous with the calyx- 

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

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



