Translator Disclaimer
31 August 2001 Lactuca stebbinsii (Lactuceae, Compositae), a puzzling new species from Angola
Norbert Kilian
Author Affiliations +
Abstract

Kilian, N.: Lactuca stebbinsii (Lactuceae, Compositae), a puzzling new species from Angola. — Willdenowia 31: 71–78. 2001. — ISSN 0511-9618.

A small perennial herb from marshy meadows in the highlands of SW Angola, only known from three 19th and early 20th century collections, is described as Lactuca stebbinsii, a species new to science, and illustrated. The taxonomic position of the unusual species with entirely beakless, apically truncate, pale brown, distinctly compressed and glabrous achenes within the Lactuca-Prenanthes line of the Lactucinae is discussed. The morphological features indicate a placement in Lactuca s.l. as the most plausible solution. Possible relationships are discussed but cannot be established yet.

See the PDF.

References

1.

E. B. Babcock 1947: The genus Crepis 1–2. — Univ. Calif. Publ. Bot. 21–22. Google Scholar

2.

G. Beauverd 1910: Contribution à l'étude des Composées, 3. Le genre Cicerbita. — Bull. Soc. Bot. Genève, ser. 2, 2: 99–145. Google Scholar

3.

L. Boulos 1972, 1973, 1974a–b: Révision systématique du genre Sonchus L. s.l. — Bot. Not. 125: 287–305, 126: 155–196, 127: 7–37, 402–451. Google Scholar

4.

K. Bremer 1994: Asteraceae. Cladistics & classification. — Portland. Google Scholar

5.

D. Dethier 1982: Le genre Lactuca L. (Asteraceae) en Afrique centrale. — Bull. Jard. Bot. Nat. Belg. 52: 367–382. Google Scholar

6.

V. Feráková 1977: The genus Lactuca L. in Europe. — Bratislava. Google Scholar

7.

W. P. Hiern 1898: Catalogue of the African plants collected by Dr. Friedrich Welwitsch in 1853–61, 3. — London. Google Scholar

8.

C. Jeffrey 1966: Notes in Compositae I. The Cichorieae in East Tropical Africa. — Kew Bull. 18: 427–486. Google Scholar

9.

C. Jeffrey & H. J. Beentje 2000: Cichorieae. — Pp. 63–108 in: H. J. Beentje & S. A. L. Smith (ed.), Flora of Tropical East Africa, Compositae 1. — Rotterdam. Google Scholar

10.

N. Kilian 1997: Revision of Launaea Cass. (Compositae, Lactuceae, Sonchinae). — Englera 17. Google Scholar

11.

W. J. M. Koopman , E. Guetta , C. C. M. van de Wiel, B. Vosman & R.G. van den Berg 1998: Phylogenetic relationships among Lactuca (Asteraceae) species and related genera based on ITS-1 DNA sequences. —  Amer. J. Bot. 85: 1517–1530. Google Scholar

12.

F. A. Mendonça 1943: Contribuïções para o conhecimento da flora de Angola 1. Compositae. — Lisboa. Google Scholar

13.

W. L. Milstead 1964: A revision of the North American species of Prenanthes. — Ph.D. thesis, Purdue University. Google Scholar

14.

G. V. Pope 1992: Flora zambesiaca 6(1). — Kew. Google Scholar

15.

A. N. Sennikov 1997: Vidy roda Prenanthes i gruppy rodov iz rodstva Cicerbita (Asteraceae) na Kavkaze. — Bot. Žurn. 82: 106–114. Google Scholar

16.

A. N. Sennikov 2000: O rodakh iz rodstva Prenanthes L. (Asteraceae). — Novosti Sist. Vysš. Rast. 32: 178–181. Google Scholar

17.

A. N. Sennikov & I. D. Illarionova 2000: Reclassification of Prenanthes pendula (Asteraceae: Lactuceae). — Compositae Newslett. 34: 53–57. Google Scholar

18.

C. Shih 1987: On circumscription of the genera Prenanthes L. and Notoseris Shih, a new genus of Compositae from China. — Acta Phytotax. Sin. 25: 183–203. Google Scholar

19.

C. Shih 1988: Revision of Lactuca L. and two new genera of tribe Lactuceae (Compositae) on the mainland of Asia. — Acta Phytotax. Sin. 26: 418–428. Google Scholar

20.

C. Shih 1991: On circumscription of the genus Cicerbita Wall., and two new genera of Compositae from Sino-Himalayan region. — Acta Phytotax. Sin. 29: 394–417. Google Scholar

21.

G. L. Stebbins 1937a: The scandent species of Prenanthes and Lactuca. — Bull. Jard. Bot. État 14: 333–352. Google Scholar

22.

G. L. Stebbins 1937b: Critical notes on Lactuca and related genera. — J. Bot. (London) 75: 12–18. Google Scholar

23.

G. L. Stebbins 1939: Notes on some Indian species of Lactuca. — Indian Forester, Bot. 1: 237–245. Google Scholar

24.

G. L. Stebbins 1940: Studies in Cichorieae: Dubyaea and Soroseris. Endemics of the Sino-Himalayan region. — Mem. Torrey Bot. Club 19(3): 1–76. Google Scholar

25.

G. Tuisl 1968: Der Verwandtschaftskreis der Gattung Lactuca L. im iranischen Hochland. Vorarbeiten zur Flora Iranica Nr. 16. — Ann. Naturhist. Mus. Wien 72: 587–638. Google Scholar

26.

J. Whitton , R. S. Wallace & R. K. Jansen 1995: Phylogenetic relationships and patterns of character change in the tribe Lactuceae (Asteraceae) based on chloroplast DNA restriction site variation. —  Canad. J. Bot. 73: 1058–1073. Google Scholar
Norbert Kilian "Lactuca stebbinsii (Lactuceae, Compositae), a puzzling new species from Angola," Willdenowia 31(1), 71-78, (31 August 2001). https://doi.org/10.3372/wi.31.31105
Published: 31 August 2001
JOURNAL ARTICLE
8 PAGES


SHARE
ARTICLE IMPACT
Back to Top