Echeveria Affinis sp.
Echeveria 'Black Knight'
AFFINIS Walther, 1958 (engl./ fr.) Series Occidentales Type : Mexico, without definite locality. CAS 403156. Etymology : Latin adjective affinis = similar, referring to E. craigiana. Distribution : Mexico (Durango, Sinaloa) First Description by Walther in Cactus and Succulent Journal (US) 30(4): 105-107.1958 (from a plant collected by Fritz Schwarz and given to Paul Hutchison by R. Flores (UC 54/1241), later grown in Strybing Arboretum, Golden Gate Park, San Franciso, CA, USA) : Stem very short, mostly simple. Rosettes dense. Leaves numerous, oblanceolate, shortly acuminate, to 5 cm long and 2 cm broad, strongly convex beneath, almost flat above, somewhat upcurved above middle, bownish-olive, at base yellowish-green. Inflorescences 2 to 3, to 15 cm tall, peduncle erect, its bracts few, oblong, acute, to 2 cm long, ascending-spreading, green, inflorescence a flat-topped cyme with 3 to 5 spreading branches and no elongated central axis, each branch with 5 to 7 flowers, pedicels 8 mm long. Flowers : Sepals appressed, subequal, ovate-deltoid to oblong-lanceolate, turgid, acute, tips somewhat incurved, olive-green, corolla urceolate-campanulate, bluntly pentagonal, 10 mm long, to 8 mm in diameter at the spreading petal-tips, scarlet, petals with small, but definite basal hollow within and apiculate tips, stamens 5 - 9 mm long, carpels 8 mm long, whitish, with slender straw-yellos styles, nectaries 1 mm wide, narrowly lunate-reniform, straw-yellow. Flowers in August. Cytology : n = 30, 60. Note: 1. As stated above, E. affinis has first been published by E. Walther in Cactus & Succulent Journal US in 1958. Walther died in 1959 and the monograph on genus Echeveria he had been working on was by far not complete at that time and it took another 13 years until it was finally published in 1972. It contains the descriptions already published in journals as well as of some new ones including whenever possible photos by E. Walther or alternatively photos by Reid Moran. The latter applies to E. affinis : Presumably because the photos of the First Description show a plant without known origin in the wild the editors replaced them with two photos of a plant collected by Moran and Kimnach in 1959 (Moran & Kimnach 7619) i.e. with well known origin. Photo Fig. 23 shows this plant flowering in San Diego 11 August 1960 and photo Fig. 25 shows the inflorescence of the same plant 4 years later, 1 August 1964. Very surprisingly the inflorescences on the two photos are fairly different, in 1960 the plant has a rather compact inflorescence while in 1964 it is much more lax. This suggests that - obviously - in cultivation E. affinis is subject to alterations. And in his notes on E. affinis Reid Moran even states that cultivated plants also differ from wild plants and this in several respects. Conclusion : E. affinis is very variable ; and the long lasting suspicion that the two photos might show two fairly similar but not identical plants is obsolete. 2. E. affinis is similar to E. craigiana, but with a shorter inflorescence. 3. A form found in Cerro Surutato is larger and has greener leaves. 4. Offered twice as - ISI 269 (1959) "This collection differs from that of the type (see the C&SJ., 30:195) in its blacker, slightly differently shaped leaves. Collected by R. J. Taylor under bushes and trees on the road between Mazatlan and Durango, Mexico. The surrounding country is mountainous, the altitude about 5000' with rains even in summer." Ignoring this indication, nurseries have distributed this special clone later as Echeveria ‘Black Knight’ – an obsolete name. - and ISI 1556 (1985).
Contributed by @gardentagssucculentexpert
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Full sun to partial shade
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Occasional watering
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A little frost hardy: 32F (0°C)
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Free draining and fertile
Common name
Echeveria 'Black Knight'
Latin name
Echeveria Affinis sp.
type
Succulent
family
Crassulaceae
ph
5.5 - 6.0 Acid - Neutral
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Light
Full sun to partial shade
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Frost
A little frost hardy: 32F (0°C)
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Soil
Free draining and fertile
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Water
Occasional watering
Plant & bloom calendar
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Best time to plant
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When the plant will bloom
full grown dimensions
0.20 M
0.15 M
Echeveria Affinis sp.
AFFINIS Walther, 1958 (engl./ fr.) Series Occidentales Type : Mexico, without definite locality. CAS 403156. Etymology : Latin adjective affinis = similar, referring to E. craigiana. Distribution : Mexico (Durango, Sinaloa) First Description by Walther in Cactus and Succulent Journal (US) 30(4): 105-107.1958 (from a plant collected by Fritz Schwarz and given to Paul Hutchison by R. Flores (UC 54/1241), later grown in Strybing Arboretum, Golden Gate Park, San Franciso, CA, USA) : Stem very short, mostly simple. Rosettes dense. Leaves numerous, oblanceolate, shortly acuminate, to 5 cm long and 2 cm broad, strongly convex beneath, almost flat above, somewhat upcurved above middle, bownish-olive, at base yellowish-green. Inflorescences 2 to 3, to 15 cm tall, peduncle erect, its bracts few, oblong, acute, to 2 cm long, ascending-spreading, green, inflorescence a flat-topped cyme with 3 to 5 spreading branches and no elongated central axis, each branch with 5 to 7 flowers, pedicels 8 mm long. Flowers : Sepals appressed, subequal, ovate-deltoid to oblong-lanceolate, turgid, acute, tips somewhat incurved, olive-green, corolla urceolate-campanulate, bluntly pentagonal, 10 mm long, to 8 mm in diameter at the spreading petal-tips, scarlet, petals with small, but definite basal hollow within and apiculate tips, stamens 5 - 9 mm long, carpels 8 mm long, whitish, with slender straw-yellos styles, nectaries 1 mm wide, narrowly lunate-reniform, straw-yellow. Flowers in August. Cytology : n = 30, 60. Note: 1. As stated above, E. affinis has first been published by E. Walther in Cactus & Succulent Journal US in 1958. Walther died in 1959 and the monograph on genus Echeveria he had been working on was by far not complete at that time and it took another 13 years until it was finally published in 1972. It contains the descriptions already published in journals as well as of some new ones including whenever possible photos by E. Walther or alternatively photos by Reid Moran. The latter applies to E. affinis : Presumably because the photos of the First Description show a plant without known origin in the wild the editors replaced them with two photos of a plant collected by Moran and Kimnach in 1959 (Moran & Kimnach 7619) i.e. with well known origin. Photo Fig. 23 shows this plant flowering in San Diego 11 August 1960 and photo Fig. 25 shows the inflorescence of the same plant 4 years later, 1 August 1964. Very surprisingly the inflorescences on the two photos are fairly different, in 1960 the plant has a rather compact inflorescence while in 1964 it is much more lax. This suggests that - obviously - in cultivation E. affinis is subject to alterations. And in his notes on E. affinis Reid Moran even states that cultivated plants also differ from wild plants and this in several respects. Conclusion : E. affinis is very variable ; and the long lasting suspicion that the two photos might show two fairly similar but not identical plants is obsolete. 2. E. affinis is similar to E. craigiana, but with a shorter inflorescence. 3. A form found in Cerro Surutato is larger and has greener leaves. 4. Offered twice as - ISI 269 (1959) "This collection differs from that of the type (see the C&SJ., 30:195) in its blacker, slightly differently shaped leaves. Collected by R. J. Taylor under bushes and trees on the road between Mazatlan and Durango, Mexico. The surrounding country is mountainous, the altitude about 5000' with rains even in summer." Ignoring this indication, nurseries have distributed this special clone later as Echeveria ‘Black Knight’ – an obsolete name. - and ISI 1556 (1985).
Planting
From Early Spring TO Late Winter
Echeveria can be propagated easily by separating pups, but also by leaf cuttings, and by seed. It needs a warm, sunny position with well drained soil to develop their foliage colour. It is recommended to position plants in an area where they are in part shade. This means that they should be in morning sun, or afternoon sun, or both (but shaded during the harsh midday period). Alternatively, plants may be grown under full filtered sun underneath shade cloth which is usually stocked by your local hardware store. 50% filtration is recommended to avoid sunburn but maintain great colour. You may need to test what works well in your particular climate. Most succulents will be grown in containers and pots and they will need good drainage medium. Add coarse grit such as perlite or pumice to soil and repot every year in late-spring. Don't worry about damaging the roots when re-potting as most Echeveria generally tolerate disturbance well.
Flowering
From Early Spring TO Late Winter
Echeveria could flower a number of times through the year. Flowering can use much of the plant’s energy, therefore it’s recommended that flower stalks are removed from sick or weaker plants until they are well established. If your plant is healthy, enjoy it’s beautiful show of blooms. Flowers on short stalks (cymes) arise from compact rosettes of succulent's fleshy, often brightly coloured leaves. Species are polycarpic, meaning that they may flower and set seed many times over the course of their lifetimes and indeed a number of times per year.
Propagating
From Early Spring TO Late Winter
Pluck a leaf gently from the stem taking care not to damage the leaf. It should have a u-shape if plucked correctly. Leave the leaf for a few days to callous over. Once this has happened, place the leaf on top of your propagation medium of choice with the u-shaped end downward, rest the leaf on a bamboo stick or similar at a 45 degree angle to the propagation medium. Propagation is best done in indirect light, not in direct sunlight. Alternatively, a grow light can be used. Roots should sprout in two to four weeks, followed by new tiny leaves. At this point, depending on the humidity and rainfall in your area, you may mist or lightly water your leaves as the plant grows. Resist the urge to remove the mother leaf once it becomes dried up and shrivelled. It’s best for this process to occur naturally.
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