262 PRACTIGAL BOTANY. 



fertile ones in long, gracefully drooping racemes, from la- 

 teral buds. Leaflets 3 or 5. Negundo aceroides, Moench. 

 Stamens usually 2 (rarely 3 or 4). Disk none. 

 Style single ; stigma 2-cleft. Ovary not lobed. Fruit a sim- 

 ple samara, winged from the apex only, or all around. The 

 small flowers in crowded panicles or racemes, from the axils 

 of last year's leaves. Leaflets 3-15. Fraxinus. 



{Ash.) 



847. Leaves trif oliolate ; leaflets rhombic-ovate, sweet- 

 scented, when bruised. Stamens 5, on a large, 5-parted 

 disk. Styles 3. A low straggling shrub. Flowers (poly- 

 gamous) yellow, in clustered, scaly-bracted, ament-like 

 spikes, preceding the leaves. Fruit a dry drupe. 



Rhus aromatica, Ait. 

 Leaves twice-pinnate, the several partial leaf -stalks 

 bearing 7-13 leaflets, the lowest pair with single leaflets. 

 Stamens 10. No disk. Style 1. A tall, large tree. Flow- 

 ers (strictly dicecious) whitish, in axillary racemes. Fruit a 

 legume. Gymuocladus Canadensis, Lam. 



848. Leaves ample, at least lanceolate, often lobed, 

 usually deciduous 852 



Leaves linear, awl-shaped, needle-form, evergreen. 



849 



849. Pistil an open scale, or none (and the ovules naked). 



850 



Pistil closed. Stamens 3, rarely 4. Perianth of 



about 6 scales, the 3 inner ones petaloid. Low undershrubs. 



851 



850. Fertile flowers consisting of carpellary scales, with- 

 out bracts, bearing 1-3 erect ovules on their base. Flowers 

 all in very small, axillary, or lateral catkins. Anther-cells 

 of the sterile flowers 3-6, attached to the lower edge of the 

 shield-shaped scale. Leaves whorled in threes, or 4-ranked 

 and much crowded. Juniperus. 



{Juniper and Med Cedar.) 



Fertile flowers solitary, bud-like, consisting merely 



of an erect, sessile ovule, surrounded by 6-8 imbricated 



scales, forming at length a cup-shaped disk, which becomes 



pulpy and berry-like, globular and red in fruit, partly en- 



