KEY TO SEED PLANTS. 



Pistils 1 or 2, distinct; calyx-tube armed with barbed prickles, its 



limb 3 to 7-parted; leaflets pinnatifld 



Aciena, p. 284. 

 Pistil 1, 1-celled; stigmas or styles often more than one. 

 Stipules present. 



Leaves alternate; fruit an achene. 

 Stipules sheathing, scarious; calyx o to 6-cleft or -parted, or 

 of distinct sepals, often petal-like; stamens 4 to 9; fruit 



a 3-sided or lenticular achene 



PoLyGONACE*, p. 148. 

 Stipules not sheathing; cahx greenish; stamens 1 to 4. 

 Flowers moncecious, very small, in ament-like inflo- 

 rescences; plants with .stinging herbage 



ITrticacb^, p. 146. 



Flowers perfect, fascicled; diminutive annual 



Alchemilla, p. 284. 

 Leaves opposite; small or prostrate herbs. 

 Calyx of 5 distinct sepals; stamens 3 to 5. 

 Fruit an achene or utricle; stipules scarious: genera nos. 



12 to 14 of CAEyOPHYLLACEiE, p. 163. 



Fruit a 3-valved capsule; stipules setaceous. . . 



Lceflingia, p. 171. 

 Calyx 5-cleft; capsule circumscissile; stipules laciniate; sta- 

 mens ,1 to 3. ,. . ... Cypselea, p. 189. 

 Stipules none. 

 Fruit an achene or utricle. 

 Leaves opposite or whorled. 

 Calyx tubular, corolla-like, the base of the tube hardening 

 and enclosing the achene; prostrate maritime herbs . 



NTCTAQINACEiE, p. 183. 



Calyx of 6 (rarely 5) distinct often petal-like sepals; fruit 

 a 3-sided or lenticular achene; leaves whorled or op- 

 posite , POLYGONACE.E, p. 148. 



Leaves alternate or opposite; calyx of 5 or fewer sepals. 

 Sepals^ herbaceous or, in unisexual flowers, the pistillate 

 without calyx and enclosed by two bracts; bractlets 

 none; mostly scurfy plants of alkaline or maritime 



habitat ■ , . Chbnopodiacejs, p. 174. 



Sepals membranous or scarious; flowers with bractlets . 

 Amakantaceje p. 172. 

 Fruit a capsule; leaves opposite. 

 Stamens numerous; capsule circumscissile; calyx of purple 



segments; perennial herb . Sesuvium, p. 189. 

 Stamens 5 or fewer; capsule opening by valves. 



Calyx of 5 distinct sepals, white inside; prostrate annual 



Mollugo, p. 188. 

 Calyx 5-lobed, the lobes petal-like; erect poronnial herb 

 maritime or of salt marshes .... ' 



Glavix, p. S74. 



