Aloe tweedieae

This entry is for reference only - plant not in production.

Overview

Aloe tweedieae is a medium to large solitary or sparsely clustering aloe native to East Africa, including Uganda, Kenya, and parts of South Sudan. It is a grassland and open woodland species known for its broad, glossy leaves and tall, branched inflorescences with pink flowers. The species is widely distributed and locally abundant across its range.

Description

This species typically forms a compact rosette of around 20 leaves and is usually solitary, though it may occasionally produce small groups. Leaves are broad, lance-shaped, and can reach approximately 20 inches long and 5 inches wide, with a glossy green surface that may show light spotting, particularly in younger plants or southern populations. The leaves spread outward to slightly arching and are edged with a cartilaginous margin bearing sharp, reddish-brown triangular teeth about 4 to 5 mm long. Plants vary in size depending on habitat, with smaller individuals occurring at higher elevations and larger forms on lowland plains. In some populations, leaves may elongate further and lose spotting with age or geographic variation.

Flowering

The inflorescence is tall and prominently branched, typically reaching 4 to 5 feet in height, forming a pyramidal structure with multiple ascending racemes. Individual racemes are relatively open and carry tubular flowers about 1 inch long. The flowers are rose pink with a yellowish mouth and are borne in a loosely arranged pattern. Flowering can occur over an extended period, with peak blooming reported from late summer through spring depending on regional conditions.

Origin and History

Aloe tweedieae has a wide distribution across the Karamoja region of Uganda, extending into Kenya and South Sudan. It grows primarily in open grasslands and deciduous woodland, occasionally on rocky outcrops, typically at elevations between about 4,900 and 5,900 feet. The species was first collected in 1934 by E.M. Tweedie near Amudat and described in 1942. It is named in her honor. Due to its broad distribution and abundance, it is not currently considered threatened. Some taxonomic treatments place it within the Aloe secundiflora complex.

Care and Cultivation

This species is adapted to semi-arid environments and performs best in well-drained soils with moderate to low irrigation. It tolerates drought and is suited to warm temperate and tropical climates. In cultivation, it benefits from full sun to light shade and can adapt to a range of conditions provided drainage is adequate. Its ecological flexibility reflects its wide natural distribution.

Frost Tenderness

Specific frost tolerance is not well documented in the provided sources, but as a species from warm, semi-arid regions, it is likely sensitive to freezing temperatures and best suited to frost-free or only lightly frosted climates.

Our specimen was originally sourced from the IAS.

Uses in the Garden

Aloe tweedieae is suitable for dry garden plantings and naturalistic landscapes where a larger, grassland-type aloe is desired. Its tall flowering structure adds vertical interest, while its adaptability makes it useful in a range of warm climates. In its native range, the plant also has traditional uses, including extraction of leaf sap for medicinal and veterinary applications.

Morphological description adapted from Thomas Cole & Tom Forrest, Aloes of Uganda: A Field Guide (2017). Taxonomic treatment follows Plants of the World Online.