The Genus
Some History
The Sections
Campylia
Chorisma
Ciconium
Cortusina
Glaucophyllum
Hoarea
Isopetalum
Jenkinsonia
Ligularia
Myrrhidium
Otidia
Pelargonium
Peristera
Polyactium
Reniformia
Subsucculentia
Sectionless
Further Reading
Links & resources
PELARGONIUM NOTES
E. M. Marais, Taxonomic Studies in Pelargonium, Section Hoarea (Geraniaceae),
PhD Thesis, University of Stellenbosch, 1994, p. 100.
Section Hoarea
Habit
Deciduous geophyte, 120-200 mm tall when in flower. Tuber turnip-shaped or elongated, sometimes moniliform root.
Credit: ©Tony Dold, reproduced with permission of the author.
Leaves
Green, rosulate, petiolate, simple or ternate, lamina ovate, apex acute, margin entire to serrate, revolute, 25-95 x 14-48 mm, adaxially and abaxially hirsute or sparsely hirsute with stiff hairs interspersed with short glandular hairs and long soft non-glandular hairs. Stipules subulate, 5 x 1 mm, adnate to petioles with apices free.
Inflorescence
Scape, bearing 2-4 pseudo-umbellets, each 3-8(-11)-flowered. Pedicel ca. 0.5 mm.
Credit: ©Tony Dold, reproduced with permission of the author.
Sepals
5, lanceolate, apices acute, 6.5-11.0 x 1.5-3.0 mm, posterior one erect, others reflexed, green to pale reddish brown with margins white. Hypanthium 33-66 mm, pale green, hirsute with distally appressed curly hairs interspersed with long glandular hairs.
Petals
5, cream-colured to yellow, claws forming a sheath, posterior two with wine-red feather-like markings, unguiculate-spathulate, bases cuneate, apices emarginate, 14-25 x 3.5-6.0 mm, anterior three spathulate, bases attenuate, apices rounded, 12-20 x 3-5 mm.
Stamens
5 fertile, concealed in the floral sheath, posterior one 2.0-3.5 mm, lateral two 3.0-4.5 mm, anterior two 4-7 mm, staminodes white, pollen orange.
Distribution
Habitat
The hilly and mountaneous areas of the Great Karoo are where P. aestivale is found, typically on rocky hillsides in karooid vegetation. This is the only species confined to the summer rainfall area, receiving 100-300 mm rainfall. The flowering time is from September to December.
Section Hoarea
Habit
Deciduous geophyte, 120-200 mm tall when in flower. Tuber turnip-shaped or elongated, sometimes moniliform root.
Credit: ©Tony Dold, reproduced with permission of the author.
Leaves
Green, rosulate, petiolate, simple or ternate, lamina ovate, apex acute, margin entire to serrate, revolute, 25-95 x 14-48 mm, adaxially and abaxially hirsute or sparsely hirsute with stiff hairs interspersed with short glandular hairs and long soft non-glandular hairs. Stipules subulate, 5 x 1 mm, adnate to petioles with apices free.
Inflorescence
Scape, bearing 2-4 pseudo-umbellets, each 3-8(-11)-flowered. Pedicel ca. 0.5 mm.
Credit: ©Tony Dold, reproduced with permission of the author.
Sepals
5, lanceolate, apices acute, 6.5-11.0 x 1.5-3.0 mm, posterior one erect, others reflexed, green to pale reddish brown with margins white. Hypanthium 33-66 mm, pale green, hirsute with distally appressed curly hairs interspersed with long glandular hairs.
Petals
5, cream-colured to yellow, claws forming a sheath, posterior two with wine-red feather-like markings, unguiculate-spathulate, bases cuneate, apices emarginate, 14-25 x 3.5-6.0 mm, anterior three spathulate, bases attenuate, apices rounded, 12-20 x 3-5 mm.
Stamens
5 fertile, concealed in the floral sheath, posterior one 2.0-3.5 mm, lateral two 3.0-4.5 mm, anterior two 4-7 mm, staminodes white, pollen orange.
Distribution
Habitat
The hilly and mountaneous areas of the Great Karoo are where P. aestivale is found, typically on rocky hillsides in karooid vegetation. This is the only species confined to the summer rainfall area, receiving 100-300 mm rainfall. The flowering time is from September to December.
E. M. Marais, Taxonomic Studies in Pelargonium, Section Hoarea (Geraniaceae), PhD Thesis, University of Stellenbosch, 1994.
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