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Accepted Scientific Name: Aloe cryptopoda Baker
J. Bot. 22: 52 (1884)
Origin and Habitat: Mozambique, Botswana, Malawi, Zambia, Zimbabwe, Republic of South Africa (Northern Prov., North-West Prov. Mpumalanga), Swaziland and southern Tanzania on the Mozambique border.
Habitat: It grows mainly on very thin soil in rocky slopes, usually steep and exposed with little or no grass.
Altitude: 600- 1600 m a.s.l.
- Aloe pienaarii Pole-Evans
Aloe cryptopoda Baker
J. Bot. 22: 52 (1884)
- Aloe cryptopoda Baker
- Aloe pienaarii Pole-Evans
- Aloe wickensii Pole-Evans
- Aloe wickensii var. lutea Reynolds
Description: Aloe pienaarii is one of the most beautiful and showy of the South African species of Aloe, it is very closely allied to Aloe cryptopoda, but is more robust with oblong, red raceme.
Stem: Aloe pienaarii ( = Aloe cryptopoda) has very short stems (almost stemless) which can become decumbent with time.
Rosettes: Dense, compact with 40-50 leaves.
Leaves: 60-90 long and 7 -15 cm wide toward the base, stout but slender, lanceolate-ensiform or gradually attenuate from base, stiffly erect and curving slightly inwards: Leaf colour varying from uniform (without spots) grey-green to dark olive green or turquoisey-grey with a pronounced velvety or rough leaf texture, often tinged purplish in dry conditions. Margin with reddish-brown to dark brown deltoid teeth, approx. 1-3 mm tall, pungent, 5-7 mm apart. Like many aloes, leaf tip browning can occur if conditions are too dry. Sap bright yellow, drying purplish.
Inflorescences: 1 to 3 at a time, 1-1,75 m tall, with 5 - 8 branches. Racemes, densely flowered, cylindrical-conical to cylindrical-acuminate, 25-35 cm long and 6-7 cm broad. Branches erect. Peduncle 1–4-branched; Bracts ovate-acuminate, scarious, brownish, approx. 10-15 long and 8-12 mm wide. Aloe cryptopoda was aptly named as the meaning is "hidden foot" describing the conspicuous character of the large bracts which clasp the pedicels and hide them from view.
Flowers: 35-40 (-45) mm approx. 9 mm in diameter across the ovary long scarlet, greenish-tipped in buds, upper half becoming yellowish at anthesis, corolla 28–35 mm long with tepals free to base, tips scarcely spreading. Stamens and stigma exserted approx. 3 mm. Aloe pienaarii has oblong, red raceme.
Blooming season: Flowers bloom in mid winter.
Fruit: The fruits are yellowish-brown ovoid, capsule 20–30 long and 13 mm broad.
Seeds: 4-5 mm, blackish-brown with narrow very dark yellowish-brown wings.
Chromosome number: 2n = 14
Subspecies, varieties, forms and cultivars of plants belonging to the Aloe cryptopoda group
- Aloe cryptopoda Baker: has dense greysh green, rosettes with showy bicoloured flowers.
- Aloe pienaarii Pole-Evans: it is a more robust form with oblong, red racemes.
- Aloe wickensii Pole-Evans: is a smaller form with bicoloured red-yellow racemes.
- Aloe wickensii var. lutea Reynolds: is a smaller, more slender plant, with more yellow and much impressive flowering. Distribution: Burgersfort and Lydenburg Districts.
Bibliography: Major references and further lectures
1) S. Kativu "Flora Zambesiaca" FZ, Vol 12 Part 3, page 48 (2001)
2) Urs Eggli “Illustrated Handbook of Suculent Plants: Monocotyledons” Springer, 2001
3) Keith Kirsten “Gardening with Keith Kirsten” Struik, 01/set/2001
4) Hans Bornman, David S. Hardy “Aloes of the South African veld” Voortrekkerpers, 1971
5) The Flowering Plants of Africa:
6) Botanical Research Institute (South Africa), South Africa. Dept. of Agricultural Technical Services “A Magazine Containing Coloured Figures with Descriptions of the Flowering Plants Indigenous in Africa ...” Volume 2. 1922. Page 41
7) Barbara Jeppe “South African aloes” Purnell, 1974. Page 61
8) Paulos Cornelis Maria Jansen, D. Cardon “Dyes and Tannins” PROTA, 2005
9) Ben-Erik Van Wyk, Gideon Smith “Guide to the Aloes of South Africa” Briza Publ., 1996
Cultivation and Propagation: It is one of the more attractive stemless aloes easy to grow and adaptable, usually single it may suckers and can form dense groups. It can be grown in large containers. Many hybrids are available, with beautiful flowers. All are drought-tolerant.
Soil: Always use a good quality, loamy sandy soil with plenty of drainage with chips at the bottom of containers.
Repotting: Use pot with good drainage.
Watering: Needs moderate to copious waterings in summer, but do not overwater, or not at all in the colder months of winter. Outdoors it can withstand long periods of drought, but they will thrive and flower more profusely if watered in the correct season. This aloe is very tolerant of drought, although the tips of the leaves may wither and curl during hot, dry periods. Supplemental watering will help keeping the leaves plump and juicy.
Fertilization: Feed it once or twice during the growing season with a fertilizer specifically formulated for cactus and succulents (poor in nitrogen), including all micro nutrients and trace elements diluted to ½ the strength recommended on the label.
Exposure: It need full sun to partial shade, but plants grown in partial shade usually look healthier and more succulent. It is however very hardy when grown in full sun with the minimum water.
Hardiness: When dry it can stand light frost but it is damaged in hard freezes, but recovers quickly. The leaf tips and blooms get damaged below -2°C (USDA zones 9b-10 ).
During the winter months, the plants should be grown cool to initiate flower development (about 5-10°C )
Pests & diseases: Incorrect watering, poor drainage or too much shade can lead to attack by pests and diseases.
Maintenance: Removal of old flower stalks; Divide the crowded clumps periodically. It grows much better outdoors in spring and summer.
Gardening: In mild climates it can be cultivated outdoors for use in landscaping, it can be grown in large, rocky, well-drained soil in gardens in drier areas. It adapts well to a variety of soils and climates, but will grow best in regions with a climate close to that of its native deserts not too cold, and not too wet. It makes an excellent ground cover, grows best in a sunny position and makes a long lasting cut flower. They grow slowly, but not agonizingly so being able to increase their width by 10- 20 cm per year under favourable conditions.
Traditional uses: This plant is suitable as a source of dye, the roots dye wool red-brown to purplish-red, depending on the mordant.
Propagation: By division of offshoots that develop around the outside of the main rosette in spring, the cuttings must be dried out for at least 1 week before planting in river sand. It is easily rooted in potting soil with warmth. It can also be propagated or by seed planted in autumn, in trays of coarse river sand, compost and soil. Sprinkle the seeds evenly on the surface and cover with a layer of small pebbles. The pebbles help the seedlings to stay upright and prevent damping off. Fresh seeds germinate quickly at 18° C. Keep seed tray in a dry corner and do not allow to dry out, but may damp off if overwatered. Transplant the seedlings after one year.
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