Hilliardiella H. Rob., 1999

Robinson, Harold, Skvarla, John J. & Funk, Vicki A., 2016, Vernonieae (Asteraceae) of southern Africa: A generic disposition of the species and a study of their pollen, PhytoKeys 60, pp. 49-126: 72-74

publication ID

http://dx.doi.org/10.3897/phytokeys.60.6734

persistent identifier

http://treatment.plazi.org/id/907CEC40-DCFD-71F5-EF94-2347EFE0C3A3

treatment provided by

PhytoKeys by Pensoft

scientific name

Hilliardiella H. Rob., 1999
status

 

Hilliardiella H. Rob., 1999   Figures 11 A–D View Figure 11 ; 12 A–D View Figure 12 ; 13 A View Figure 13 ; 14 A–H View Figure 14

Hilliardiella   H. Rob. Proc. Biol. Soc. Wash. 112(1): 247. 1999. - Type: Vernonia pinifolia   (Lam.) Less.

Webbia   DC., Prodr. 5: 72. Oct 1836, nom. illeg., not Webbia   Spach, Jun 1836.

Vernonia subsect. Hilliardianae   S.B. Jones, Rhodora 83: 66. 1981. - Type: Vernonia oligocephala   (DC.) Sch. Bip.

Descriptions.

Herbaceous perennials to 1 m tall; stems pilose, hairs unequally T-shaped. Leaves alternate; blades abaxially often densely canescent pilose. Inflorescence laxly to subdensely corymbiform-cymose. Heads short-pedunculate; involucres campanulate, bracts 25-40, in ca. 3-4 series, persistent; receptacle epaleaceous. Florets 12-20 in a head; corollas purple, outside with few to many slightly contorted T-shaped hairs; basal tube funneliform above, throat short, lobes linear; anther thecae not or shortly appendaged at base; apical appendages glabrous, with thin walls; style with basal node; style branches with acicular sweeping hairs. Achenes 4-5-costate, densely setuliferous, setulae scarcely divided at tips, idioblasts numerous, raphids elongate, carpopodia narrowly cylindrical; pappus bristles white, barbate, tenuous, subpersistent, outer series shortly lanceolate. Chromosome number of n = 9, 10, most reports n = 10 ( Turner and Lewis 1965; Jones 1982).

Pollen grains sublophate, with continuous perforated tectum between colpi, tricolporate to poles, echinate (Fig. 14 A–H View Figure 14 ).

Notable secondary metabolites; acetones & sesquiterpene glaucolides/ hirsutanolides ( Bohlmann and Jakupovic (1990, as Vernonia sutherlandii   Harv., guaianolides, bisabolene derivatives ( Bohlmann and Jakupovic 1990, as Vernonia hirsuta   Sch. Bip. ex Walp. and Vernonia oligocephala   (DC.) Sch. Bip. ex Walp.).

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Asterales

Family

Asteraceae

Loc

Hilliardiella H. Rob., 1999

Robinson, Harold, Skvarla, John J. & Funk, Vicki A. 2016
2016
Loc

Vernonia pinifolia

Less 1829
1829