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Hibiscus striatus ssp. lambertianus
Hibiscus striatus ssp. lamHibiscus striatus ssp. lambertianusbertianus | Striped Rosemallow

Hibiscus striatus ssp. Lambertianus is a North American perennial that is found growing naturally in marshes and ditches throughout various locations in south-eastern Texas. It was formerly known as Hibiscus cubensis. The grayish-green leaves have velvety hairs, the long stems have small spines. This deciduous species dies back in winter, then re-sprouts to produce attractive pinkish-lavender flowers throughout sping and summer. Hibiscus striatus ssp. striatus is native to Cuba and parts of Central America. Hibiscus striatus is closely related to the South American Hibiscus cisplatinus.

Reference: Taxonomic Relationship of Hibiscus cubensis, H. cisplatinus and H. lambertianus: Hibiscus cubensis Rich., H. cisplatinus St.-Hil and H. lambertianus H.B.K. have been placed by Hochreutiner (1900) in section Trionum of the genus. The three are extremely similar morphologically and all have a chromosome number of n = 26 (MenzeI, unpublished; Wise, unpublished). Vouchers numbers 459, 441, 442, and 448 are filed (FSU).

H. cisplatinus and H. lambertianus from Argentina, and H. cubensis from Calhoun Co., Texas, were hybridized by the authors. The Texas population is probably an introduction, since it is the only known location of H. cubensis in North America. It normally occurs in Cuba. A total of 7 out of 42 cross-pollinations between H. cubensis and H. cisplatinus set seed. 26 crosses between H. lambertianus and H. cisplatinus gave 3 hybrid capsules and 7 cross-pollinations out of a total 29 between H. lambertianus and H. cubensis were successful.

Hybrids among these three strains were fertile and produced fertile F2 progeny when selfed. 26 pairs of chromosomes were seen in each of the three possible F1 combinations. The F2 progenies were morphologically very homogeneous. No hybrids out of a total of 355 cross-pollinations were obtained between these three plants and 9 other members of sect. Trionum.

Because of the small amount of genetic differentiation among these three plants, it is suggested that they should be regarded as subspecies. In this event, the name Hibiscus lambertianus would have priority.

WISE, D. A. 1970 - Unpublished Thesis, Florida State University, Tallahassee. Florida.
D. A. WISE and M. Y. MENZEL Florida State Universit