CLETHRACEAE. 91 



1. 0. floridum (L.) Baf. Tree sometimes 15 m. tall, with rough black bark, 

 or shrub: leaf-blades elliptic to oval, 5-18 cm. long, pale beneath: involucral 

 bracts white or pink, obovate, 4-6 cm. long: petals linear, 3-4.5 mm. ?ong: 

 drupes oblong to oval, about 15 mm. long, red. FLOWERING-DOGWOOD. 

 Woods, n. Fla. and the upper pen. (Cont.) Spr. 



FAMILY 2. HEDERACEAE. IVY FAMILY. 



Herbs, shrubs, trees, or vines. Leaves alternate: blades simple or 

 compound. Flowers perfect or polygamous, often umbellate. Calyx of 5 

 sepals, or obsolete. Corolla of 5 or 10 petals. Gynoecium of 2-5 united 

 carpels. Styles often distinct. Fruit a berry or a drupe. 



1. AEALIA [Tourn.] L. Perennial herbs, or shrubs or trees, sometimes 

 prickle-armed or spiny. Leaves alternate: blades pinnately or ternately com- 

 pound. Umbel compound. Ovary mostly 5-celled. Styles distinct. Fruit black. 



1. A. spinosa L. Shrub or small tree, prickle-armed: blades of the leaflets 

 leathery: hypanthium broad-turbinate : petals longer than the hypanthium: 

 berries 6-7 mm. in diameter : seeds about 4 mm. long. PRICKLY-ASH. 

 HERCULES '-CLUB. 



Rich woods and swamps, n. Fla. (Cont.) Sum. 



Series 2. GAMOPETALAE. 



Petals more or less united, or occasionally distinct, or very 

 rarely wanting. 



Order ERICALES. 



Herbs, undershrubs, shrubs, or trees, sometimes humus-plants or 

 saprophytes. Leaves alternate, often evergreen: blades simple. Flowers 

 mainly perfect and complete. Calyx of 2-8, usually 5, partially united 

 sepals. Corolla of 2-8, usually 5, mostly united petals. Androecium of as 

 many or twice as many stamens as petals, sometimes partially reduced to 

 staminodia: filaments mostly free. Gynoecium of several united carpels. 

 Fruit capsular, baccate, or drupaceous. 



Gynoecium with a superior ovary : fruit capsular. 



Petals distinct, short : pollen-grains simple. Fatn. 1. CLETHRACEAE. 



Petals more or less united, except in Bcjaria, which has 



long petals : pollen-grains compound. Fam. 2. ERICACEAE. 



Gynoecium with an inferior ovary : fruit baccate or drupaceous. Fam. 3. VACCINIACEAE. 



FAMILY 1. CLETHRACEAE. WHITE-ALDER FAMILY. 



Shrubs or trees, the pubescence of branched hairs. Leaves deciduous : 

 blades mostly toothed. Flowers in racemes or panicles. Calyx of 5 

 persistent sepals. Corolla white, of 5 distinct petals. Androecium of 10 

 stamens : filaments elongate : anthers inverted in anthesis. Gynoecium of 3 

 united carpels: stigmas 3. Fruit a 3-valved loculicidal capsule. 



1. CLETHBA [Gronov.] L. Erect shrubs or trees, with toothed leaf -blades 

 and elongate racemes or panicles. Sum. PEPPERBUSH. WHITE-ALDER. 



Sepals acute : leaf-blades glabrous beneath, or nearly so. 1. O. alnifolia. 



Sepals obtuse: leaf-blades tomentose beneath. 2. O. tomentosa. 



1. C. alnifolia L. Shrub 1-3 m. tall, the twigs sparingly pubescent : leaf -blades 

 obovate or cuneate, 3-8 cm. long: pedicels 1-3 mm. long: sepals oblong to 



