Hibiscus striatus ssp. lambertianus
| 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of n = 26 (MenzeI, unpublished; Wise, unpublished).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
WISE, D. A. 1970 - Unpublished Thesis, Florida State University,
D. A. WISE and M. Y. MENZEL Florida State Universit