Haplophyton crooksii

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Cladus: Lamiids
Ordo: Gentianales

Familia: Apocynaceae
Subfamilia: Rauvolfioideae
Tribus: Aspidospermateae
Genus: Haplophyton
Species: Haplophyton crooksii
Name

Haplophyton crooksii (L.D.Benson) L.D.Benson
References

American Journal of Botany. Lancaster, PA 30:630. 1943
USDA, ARS, Germplasm Resources Information Network. Haplophyton crooksii in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.

Haplophyton crooksii is a plant species native to Arizona, New Mexico, Texas, and northern Mexico. It is an herb up to 60 cm tall, with showy yellow flowers, found on rocky slopes in desert scrub and desert grassland.[2][3]

The plant is commonly called the cockroach plant (or hierba de la cucaracha) because of its insecticidal properties.[3]
References
Wikispecies has information related to Haplophyton crooksii.

Tropicos
L.D. Benson. 1943. American Journal of Botany 30(8): 630. 1943.
McLaughliln, S.P. 1993. Apocynaceae A.L. Juss., Dogbane Family. Journal of the Arizona-Nevada Academy of Science 27:164-168.