Okdek 45.— the milkworts. 



185 



4 Fruit covered with prickles. Petals 4 or 5, spreading 1,2 



§ Fruit smooth. Petals 4, erect, 2 of tliem clawed.*. . .3-5 



i iE. Hippocasta'neum. Horie Chestnut, Leaves of 7, obovate leaflets. Petals 5. 



Fruit priokry. Panicles large, handsome. + 

 2 JE. glabra. Ohio Buchm/e. Leaflets 5, oval or oblong. Petals 4. Tree ill- 

 soentcd. Flowers yellowish. Seed mahogany-color. "W. 



3 X. fla'va. Big Buckeye. A large tree, with pale-yellow flowers. Leaflets 5-7. 



Petals very unequal, longer than stamens. "W. 



4 I&- Pa'vii. Medr-flowered B. Shrub 3-lOf. Fls. large, red, in thyrse-liKC racemes. 



Very handsome. S. t 



5 E. parviflo'ra. White B. Shrub 2-8f. Petals 4, somewhat alike, spreading, 



thrice shorter than the stamens. S. 



2. STAPHYLE'A. Bladder-nut 

 Flowers perfect. Sepals 5, colored like the 5 petals. Stamens 5. 

 Styles 3. Capsules 2 or 3, with thin, inflated waEs.— Shrubs. 

 1 S. trifo'lia. Ternate B. A handsome shrub, 6-8f. high. Leaves ternate, leaflets 

 ovate. Eacemes penduloas. Petals _„ _„ ^1 



cUiate below. Fruit very large, 8- 

 celled, inflated like a bladder. 



Order XLV. POLYGALA- 

 CB^. The Milkworts. 



Plants without stipules, bearing very- 

 irregular flowers ; 



staTnens 4-8, diadelphons ; 



anthers opening at the top, 1-oeUed ; 



fruit a flattened, 2-celIed, 2-seeded 

 capsule, free from the calyx. 



Fig. 437. Polygala polygama: a, the radical 

 flowers; 8, P. pauoifolia; f, the crest on the 

 lower i)etal; 9, the stamens in 2 sets, and the 

 style seen beneath the hooded lower petal. 



.Fig. 440. The ovary and the style : 1, seed of 

 P. sanguines, with its 2-lobed caruncle; 2, seed 

 of P. Nuttallii. 



POLYG'ALA. Milkwort 

 Sepals 5, persistent, 2 of them 

 (wings) wing-shaped and colored. 



