140 HALOEAGIDACEAE 



1. H. speoiosa (Nutt.) Small. White Evening Peimeose. 6^-24' 

 high, pubernlent : leaves lanceolate, sinuate-denticulate : flowers I'-S' 

 broad, rose- colored to white, showy. — Abundant in barrens throughout 

 the southern part. May-June. 



6. MERIOLIX Baf. 



Flowers axillary, the parts in fours. Stamens equal. Calyx tubes 

 short. Capsules linear-cylindrio. 



1. M. serrulata (Nutt.) Walp. Yellow Evening Peimbose. 8'- 

 15' high, canescent : leaves linear-lanceolate, denticulate : flowers &'- 

 18" broad. — Barely adventized near Sheffield. May-June. 



7. GAURA L. 



Flowers spioate-raoemose. Parts of the flower in fours. Petals clawed. 

 Filaments 8, each with a scale at base. Fruit indehiscent, ribbed, 

 1- celled, 1-4-seeded. 



Plants 3°-5° high. 



Stems long-hirsute. 1. G. parviflora. 



Stems appressed-pubeacent. 2. G. biennis. 



Plants l°-2° high. 3. G. coccinea. 



1. G. parviflora Dougl. Stems 3°-5° high, long-pubescent : leaves 

 ovate-lanceolate, repand-dentionlate : flowers 2" broad : fruit 4-angled, 

 glabrous. ^Rather common in dry soil, especially around Kansas City. 

 May-August. 



2. G. biennis L. 3°-5° high, appressed-pubesoent : leaves oblong- 

 lanceolate, denticulate : flowers ¥'-h" broad, light pink : frnit 4-ribbed, 

 pubescent. — Not uncommon in dry soil throughout. July-September. 



3. G. coccinea Pursh. l°-2° high, canescent : leaves lanceolate-ob- 

 long, repand-denticnlate : flowers i"-b" broad, reddish-pink : fruit 

 4-sided above, canescent. — Barely adventized near Sheffield and Ather- 

 ton. May- July. 



8. CIRCAEA L. 



Perennial with racemose whitish flowers, and opposite long-petioled 

 leaves. Fruit 1-2-celled, 1-2-seeded, densely bristly with hooked hairs. 



1. C. Luteticina L. Enchantbk's Nightshade. 1°-2° high : leaves 

 ovate, toothed : flowers ly broad. Abundant in rich woods throughout. 

 June-August. 



Family 91. HALOEAGIDACEAE Kl. & Garcke. 

 Aquatic herbs with small sessile axillary flowers. Calyx tube coherent 

 with the ovary. Petals 0-4. Stamens 1-8. Ovary 1-4 celled, each cell 

 containing a single ovule. 



1. MYRIOPHYLLUM L. 



Flowers monoecious or polygamous, the parts in fours. Leaves wborled, 

 the submersed pinoately divided, the emersed variously out. 



