There is also other, very little known species – P. sabulosa (Sand Dune Unicorn Plant). It is smaller plant which very differ of other species – it has relatively large, long, narrow seeds and small long purple flowers with original appearance. The fruits are something similar to next (look at below) species and drupelets have 4-angular lateral edge of claws (other species have rounded edge). It needs sandy fertile moist soil. It is very rarely met in wild state (only in south-west Texas, New Mexico and northern Mexico).
|There is visible the 4-angular lateral edge of claws|