206 Planta Lindhcimcriana. 



OPUNTIA. 

 <§> 1. Applanatce. 



O. macrorhiza (n. sp.) : prostrata ; articulis obovato-or- 

 biculatis planiusculis ; pulvillis setis fuscis et saepe aculeis 

 singulis binisve instructis ; aculeis teretibus validis porrectis s. 

 paulo deflexis basi apiceque fuscis ceterum albidis cum 

 adventitio inferiore graciliore reflexo ssepe deficiente ; flori- 

 bus sulphureis basi intus rubellis ; ovario sepalis subulatis 

 deciduis 13 in axillis setulas fuscas brevissimas gerentibus 

 stipato ; sepalis interioribus 15-18 subulatis et (internis) 

 ovatis acuminato-cuspidatis ; petalis 8 sepala superantibus 

 late obovato-spathulatis obtusis cuspidatis eroso-denticula- 

 tis ; stigmatibus 5 obtusis, adpressis, stamina numerosa 

 sequantibus ; bacca subpulposa clavata glabrata ; seminibus 

 marginatis. — Naked, sterile, rocky places on the Upper 

 Guadaloupe. Flowers (in St. Louis) in June. Root a large 

 and fleshy tuber, sometimes 2 or 3 inches in diameter ; joints 

 3-4 inches long, about 2§— 3| wide, hardly attenuate at the 

 base. Leaves subulate, about 5 lines long. Areolae |-1 

 inch distant, more crowded toward the base and on the 

 edges: spines (often wanting) 1 inch long, the smaller 4-6 

 lines long. Flower 3 inches in diameter: ovary 1* inch long: 

 petals 1 inch wide, 1\ inch long, pale yellow, red at the base. 

 Fruit \\ inches long; the strongly margined seeds compara- 

 tively few, 2| lines in diameter. — I have found the same plant 

 in similar situations in Western Arkansas ; and it is possible 

 that it may be one of Nuttall's new species (O. mesacantha, 

 0. caspitosa, or 0. humifusa) of which I cannot find a de- 

 scription. — Nearly related to O. vulgaris. 



O. intermedia, Salm. The species mentioned in PL 

 Lindh. 1. c. No. 1. has since produced abundant flowers and 

 fruit, and proves to be the above plant. It is near O. vulga- 

 ris, but more erect, or ascending ; the joints much larger ; 

 flowers larger (4|-5 inches in diameter) ; ovary more slender, 

 2 - 2| inches long, with 20 - 25 subulate sepals ; petals obcor- 



