74 SANTA LACE A E 



1. URTICA L. 



Staminate flowers with a 4-parted calyx and four stameus. Pistillate 

 calyx composed of four unequal segments, the two outer smaller. Herbs 

 with stinging hairs. 



1. U. gracilis Ait. Slender Nettle. Sparingly stinging, 2°-8° 

 high : leaves ovate lanceolate, sharply serrate, nearly glabrous. — Common 

 in low grounds. June-October. 



2. URTICASTRUM Fabr. 



Staminate flowers with five sepals, five stamens and a rudimentary 

 ovary. Pistillate calyx composed of four sepals, the outer two minute. 

 Achene very oblique. 



1. U. divaricatum (L. ) Kuntze. Wood Nettle. 2°-4° high: 

 leaves ovate, sharply serrate, long-petioled : flower clusters large and 

 loose : ultimate branches of panicle wing-margined. — A very stinging 

 herb, common in rich woods. July-October. 



3. ADICEA Raf. 



Staminate flowers with a 3-4- parted calyx, 3-4 stamens and a rudi- 

 mentary ovary. Pistillate calyx composed of three sepals. Flowers in 

 axillary clusters. 



1. A. pumila (L. ) Raf. Clearweed. Annual, 6'-20' high, succu- 

 lent : leaves slender petioled, ovate, wedge-shaped at base, and coarsely 

 dentate above. — Common in moist shaded woods. August-October. 



4. BOEHMERIA Jacq. 

 Staminate flowers as in Adicea. Pistillate calyx tubular, entire, or 

 2-4-toothed, enclosing the ovary. 



1. B. cylindrica (L. ) Willd. False Nettle. A rough perennial, 

 l°-3° high : leaves ovate, 3-nerved, long petioled, serrate, ciliate. — In 

 low grounds near Lake City, Courtney and Sibley. Not common. July- 

 October. 



5. PARIETARIA L. 



Staminate flowers as in Adicea. Pistillate calyx 4-lobed. Flowers in- 

 termixed in involucrate-bracted axillary clusters. 



1. P. Pennsylvanica Muhl. Pellitory. A low weak annual, 

 G^-12' high with entire, 3-nerved, oblong-lanceolate, ciliate and dotted 

 leaves : bracts 2-3 times the length of the flowers, ciliate. — Common in 

 dry woods. May-October. 



Family 35. SANTALACEAE R. Br. 

 Plants with entire leaves. Calyx 3-G-lobed, its lobes valvate. Sta- 

 mens as many as calyx lobes and opposite them, inserted on a disk near 

 their base. Ovary inferior, 1 celled, bearing 3-4 ovules, pendulous from 

 the summit of the central placentae. 



