292 DECANDRIA PENTAGTXIA. 



Species. 1. L. Alpina. 



A dispersed genus, but principally European. * 



320. OXALIS. X. (Wood-sorrvl.) 



Calix 5 leaved, persistent. Fefah 5, partly 

 connected at the claws. Stamina linequal, con- 

 nected at the base, 5 of them alternately shorter. 

 Capside pentangular, 5-cellcd, burstii\^ at the 

 angles. Seeds covered by an clastic arillus. 



Herbaceous plants witli tuberous roots, caulescent or 

 scapose; leaves ag'greg'ated, alternate, ternate, in a few 

 tpecies simple or binale, digitate, or mtdtifid, in 1 pinnate 

 \vith the leaves sensitive as in Mimosa; leaves at first spi- 

 rally involate; scape 1-tiowered, or unjbeUate, and ia- 

 volucrate. 



Species. 1. O. JlcetofieUa. 2. violccea. This species 

 appears often to flov^er again late in the autumn, and is 

 tlien destitute of leaves. 3. Lyoni. Pii. 4. corniculata. 

 5. strictu. 6. Dilleiiii. These 2 last are scarcely distinct 

 species. 



This g-enus of more than 100 species is, with a few ex- 

 ceptions in Europe and America, peculiarly indigenous 

 to tiie Cape of Good Hope. The leaves of all the species 

 are more or less sensitive and uictitant. 



221. PENTHORUM. L. 



Calix 5 to 10 cleft. Petals 5 or wantins:. 

 Capsule with 5 cusps, and 5-cells, cells dividing 

 transversely, many-seeded; seeds minute. 



Herbaceous, and subaquatic; leaves alternate, not suc- 

 culent, margin serrate; flowers terminal, cymosely spiked. 



Species. 1. P. scdoides. According to Mr. I'ursii 

 thei'e is a second species of this genus in China, coUeco- 

 ted by Sir G. Staunton. 



S22. SEDUM. L. (Stonecrop.) 



Calix 5 -cleft. Petals 5. Five nectariferous 

 scales at the base of the germ. Capsules 5, su- 

 perior, many-seeded, openin.o; internally. 



Herbaceous and succulent; leaves alternate, sometime!; 

 subverticillate; flat or cylindric; flowers cymose, mostly 

 terminal, sometimes solitary and axillary. 



Species. \. S. pulchelbam. Closely allied to the fol- 

 lowing. Commencing in Virginia about Harper's Ferry, 



