106 TETRANDRIA. DIGTNIA. 



Species. 1. S. fatida. Well known as a rank and 

 offensive weed througlioiit the United Slates, from f ^ana- 

 da to Carolina. Thegends Pothos to which this plant is 

 allied, though very distinct, exists almost exclusively 

 within tlie tropical parts of America. 



158. ALCHEMILLA. L. (Ladios-mantlc.) 



Calix tubulous, border spread jme^, 8-rleft, 

 segments alternately smaller. Petals 0. Stami- 

 na very small. Germ 1: st^j'e 1, lateral, tVoiii 

 the base of the germ. Stigma 1. Seed 1, covered 

 by th^' eonniveiit ralix. 



H^rbs with palmate or subdigitate leaves; flowers co- 

 rynil)ose .txillary and terminal. 



Species. 1.' .4. alplna. On the mountains of New 

 Hampsiiire. A plant common to the alpine legions of Eu- 

 rope. This genus, containing 6 species, with the excep- 

 tion of 1 at the Cape of Oood Hope, and another in New 

 Granada, is confintd to Europe. 



Order II. — Digynia. 



159. APHANES. L. (Parsley Piert.) 



Calix B-clcft, alternate segments minuce. 

 Petals 0. Stamina minute. Styles 2. Seeds 2, 



place of a cotyledon there is a sheathing stipule similar to that 

 M'hich is ever after produced; in fact it is viviparous. The em- 

 bryon is seated in a small umbihcai or hemispherical depres- 

 sion, in Lhe upper end of what may be called a vitellus rather 

 than a' perisperm, judging fro^n its functions; this callus, or 

 seminal tubercle is roundish and turbinate, nearly as large as 

 a filbert nut, very solid and carneous, possessing in a high de- 

 gree the adiaceous fostor of the grown plant; the mutual point 

 of attachment subsisting betwixt this body and the embryon is 

 at first a minute and nearly central funiculus which enlarges 

 and becomes more distinct during the progress of germination; 

 but what appears to be most singular in it, is the length of time 

 which it continues attached to the growing plant, apparently 

 inert at the base of the caudex for t\\elve or even eighteen 

 roontlis. 



