106 OLEACEAE. 



flowers and 8 or fewer in the pistillate flowers; fruit globose, about one inch 

 in diameter, reddish yellow, ripe after frost, edible; seeds 0-8, large, dark 

 purple. Woods; May-Juue; reported from southeastern Iowa. 

 OLEACEAE Limit. Olive Family. , 

 Trees or shrubs. Leaves opposite, simple or compound. Calyx and 

 corolla usually 4-cleft, sometimes wanting. Stamens 2. Ovary free, 2- 

 celled, with 2 ovules in each cell. 



Fraxinus. Leaves pinnate : flowers dioecious: fruit a samara. 

 Svkinga. Leaves simple; flowers complete; fruit a capsule. 



FRAXINUS L. Ash. Flowers dioecious, racemose or panicled, axillary, 

 from second year's growth. Calyx diminutive or wanting, entire or 4-cleft. 

 Corolla of 2-4 petals or wanting. Anthers linear or oblong. Style 1, stigma 

 2-cleft. Fruit a samara. 



* Lateral leaflets stalked; calyx small, persistent. 

 f Buds/ of the samara terete <ir nearly mi, the wing mostly terminal. 



p. americana L. White Ash. A large tree; leaflets 5-9, ovate or lanceo- 

 late, acuminate, obscurely serrate, smooth or pubescent on the veins beneath, 

 petioles, petiolules and branchlets glabrous; body of the fruit terete, half as 

 long as the wing, marginless below, wing rising abruptly above, varying in 

 outline from lanceolate to linear. Along streams; April-May; frequent. 



p. Viridis Mx. Ghrecn Ash. A smaller tree, leaflets 5-9, ovate or lance- 

 ovate, taper-pointed, serrate, bright green below, petioles, petiolules, and 

 branchlets glabrous; body of the fruit slender, as long as the wing, tapering; 

 wing decurrent, spatulate. Woods; April-May; frequent. (F. lanceolata 

 Borck.) 



p. pubescens Lam. Bed Ash., Branches, petioles, petiolules, rachis, and 

 lower surfaces of the leaves .velvety-pubescent;' leaflets 5-H, ovate, ovate-lan- 

 ceolate or oblong, acuminate, entire or denticulate; hody of the fruit linear, 

 wing linear or spatulate, decurrent. Creek bottoms; April-May; reported 

 from Muscatine county. (F. pennsylvanlca Marsh.) 



f f Body of the samara flat, wuujed all around.. 



p. quadrangulota Mx. Blue Ash. Branchlets 4-angular; leaflets 7-11, 



glabrous, ovate, lanceolate, or oblong, acuminate, base narrowed or rounded, 



serrate or serrulate; samara narrowly oblong or cuneate, wing usually 



notched above, decurrent around the body. Reported from Fayette county. 



* * Lateral leaflets sessile; calyx waiituuj: samara winged all around. 



p. sambucifolici Lam. Black Ash.. Leaflets 7-1 1, sessile, oblong-lanceo- 

 late, tapering, serrate; fruit oblong or linen r-oblong, ends equal. Along 

 streams; April-May; infrequent; reported from Muscatine and Story conn- 

 ties. (F. nigra Marsh.) 



SYRINGA L. A shrub, with opposite entire deciduous leaves, and com- 

 plete flowers in terminal panicles or thyrses. Calyx 4-toothed. persistent. 

 Corolla 4-lobed. Stamens 2. Ovary 2-celled. with 2 pendulous ovules in each 

 cell; style elongated; stigma 2-cleft. Capsule oblong, '-'-valved. 



S. vulgaris L. Lilac. Run wild along the railway in Dubuque county. 



APOCYNACEAE Li,atl. Dogbane Family. 

 Perennial herbs, with milky juice, opposite leaves, and regular 5-partcd 

 flowers. Calyx persistent. Lobes of the corolla twisted in the bud. 

 Stamens 5, inserted on the corolla; filaments distinct, pollen granular. 

 Ovaries 2, superior; stigmas united. Fruit a follicle. 



