Class V. Order II. 99 



103. THESIUM. 



THESIUM UMBELLATUM. Li. Umbelled Thesium. 



Flowers umbelled ; leaves oblong. L. 



Syn. THESIUM CORTMBULOSUM. Mich. 



COMAXDRA UMBELLATA. Nutlall. 



Stem round, slender, seldom exceeding a foot in height. 

 Leaves oval-lanceolate, mostly entire, alternate, smooth. Branch- 

 es near the top, few, alternate. Umbels of few flowers, termi- 

 nal, with an involucre of about four leafets. Flowers on short 

 peduncles. Calyx five cleft, the tube green, segments white. 

 Stamens inserted on the calyx. Seed one. Dry woods. June. 



A tuft of pubescence connects the anthers with the segments 

 of the calyx. According to Mr. Nuttall, the germ is three seed- 

 ed and becomes afterwards one seeded by abortion. He consid- 

 ers the calyx as terminating in a glandular ring, the segments 

 above being petals. These characters form his genus Comandrct. 



104. QUERIA. 



QUERIA CANADENSIS. L. Queria. 



Stem erect, dichotomous ; leaves oval ; stipules 

 scariose. 



Syn. AKTCHIA DICHOTOMA. MX. 



A very slender branching plant. Stem dividing by forks into 

 numerous, filiform branches, the joints furnished with a pair of 

 very small oval, subsessile leaves, and several minute membra- 

 nous stipules. Flowers minute. Stamens variable from three 

 to five. Dry woods. July, August. 



DIGYJVM. 



105. APOCYNUM. 

 APOCYNUM ANDROSJEMIFOLITM. Dog's Bane. 



Bigelow, Medical Botany, PI. xsxvi. 



Glabrous ; stem erect and branching ; cymes late- 

 ral and terminal ; corolla spreading. 



This grows often to the height of five or six feet, though its 

 common elevation is three or four. Its stalk is smooth, simple 



