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FREQUENTLY ASKED QUESTIONS

2. Are these species threatened with extinction?

Good news! As far as I know at present, no Adromischus deserves the highest conservation classifications of Extinct (EX, EW), Endangered (CR, EN) or Vulnerable (VU). Their habitat preference for rocky terrain means that they live in places unlikely to be developed. Their ease of propagation from leaves should alleviate any threat from excessive collection by people. Many species are widespread and all of the known taxa come from multiple populations.

The following taxa have been listed on one or another of the SA Red Data Plant Lists.

Taxon1996 Status *2007 Interim Global Status ***2007 Interim SA National Status ***Comments
A. bicolorInsufficiently KnownLeast ConcernRareFound across 100 km E-W from multiple populations E. Willowmore to E. Steytlerville, but sparsely documented in herbaria. Rare.
A. cooperiInsufficiently KnownNot listedNot listedReported from many high mountains across 280 km of the E. Cape. Not Threatened.
A. cristatus var. mzimvubuensisNot listedLeast ConcernRareAssuming localised plants of A. cristatus from other valleys along the Indian Ocean coast are the same taxon, then it has been found across 300 km. Rare.
A. cristatus var. schonlandiiNot listedLeast ConcernRareTaxonomic status needs better justification. Occasional narrow-leaved forms of A. cristatus occur widely scattered. Rare, but also Data Deficient.
A. cristatus var. zeyheriInsufficiently KnownData DeficientData DeficientTL needs to be identified with certainty. Rare, but also Data Deficient.
A. diabolicusIndeterminateLeast ConcernRarePoorly documented in herbaria and doubtfully distinct from A. nanus. Needs to be refound at its TL to verify distribution. Data Deficient.
A. fallaxIndeterminateLeast ConcernRareFound in modern times at two places around Graaff Reinet by PVB on high escarpment cliffs. Probably more widespread at equally inaccessible places. Rare.
A. halesowensisNot listedNot listedNot listedRefound in habitat, but taxonomic status still open. Rare and Data Deficient.
A. humilisInsufficiently KnownLeast ConcernRareEasily confused with Tylecodon ventricosus out of flower. Documented across 140 km scattered near the Nuweveldberge. Not Threatened.
A. liebenbergii RareNot listedNot listedFound across 150 km E-W from the southern Tanqua Karoo, around Matjiesfontein to Laingsburg. Just localised and sparse. Not Threatened.
A. mamillarisRareStill to be assessedStill to be assessedRefound in habitat by PVB, but taxonomic status still open. Very Rare!
A. marianiae var. marianiaeInsufficiently KnownNot listedNot listedFound across 50 km both W. & E. of the Cederberg around Clanwilliam. Not Threatened.
A. marianiae "geyeri"Not listedNot listedNot listedProbably restricted to a small area of coastal mountains near Rosh Pinah, Namibia. Rare.
A. marianiae var. halliiInsufficiently KnownLeast ConcernRareAssuming inland material is the same taxon as from the TL on the coast, found across 350 km from the Sperrgebiet to E. Concordia, but poorly documented in herbaria. Not Threatened.
A. marianiae "Little Spheroid"Not listedNot listedNot listedName not yet published, but very restricted across 30 km in the Namaqualand coastal plains, with only two herbarium records. Rare.
A. maximusNot listedLeast ConcernRareFrom a small area around Klawer about 30 km across. Rare.
A. nanusRareNot listedNot listedOnly rarely observed because of its small size and habit of growing tucked under the sides of rocks. Found on mountains in W. Bushmanland across 90 km from S. Vioolsdrift to E. Concordia. Not Threatened.
A. phillipsiaeInsufficiently KnownNot listedNot listedEasily confused with Tylecodon ventricosus out of flower. Found by PVB in two centres: S. Khamiesberg and S. Roggeveldberge to Matjiesfontein. Not Threatened.
A. roanianusNot listedLeast ConcernRareTaxonomic status needs better justification - A. hemisphaericus grows nearby. Data Deficient.
A. schuldtianus subsp. schuldtianusNot listedData Deficient **Data Deficient **Localised and sparse populations reported across 600 km N-S through central Namibia. Not Threatened.
A. schuldtianus subsp. juttae RareData Deficient **Data Deficient **Doubtfully distinct from the typical subsp. Taxonomic status needs better justificationData Deficient.
A. schuldtianus subsp. brandbergensisNot listedNot listedNot listedEndemic to the remote Brandberg, Namibia. Rare.
A. subviridisRareLeast ConcernRareSmall and localised populations scattered across 100 km from N. Nieuwoudtville to S. Calvinia, but only one herbarium record! Rare.
A. umbraticolaNot listedNear ThreatenedNear ThreatenedHistorically, localised and sparse populations reported across 200 km E-W and 100 km N-S around Pretoria and Jo'burg. Not Threatened, but locals may know otherwise nowadays ...
A. umbraticola var. ramosusNot listedData DeficientData DeficientLocalised and sparse populations reported across 250 km of Limpopo Province e.g. Blouberg, Soutpansberg, Waterberg, but only a few herbarium records. Not Threatened.

* Strelitzia 4, The Red Data List of Southern African Plants, Craig Hilton-Taylor (1996), SANBI, hard cover, A4, 117 pp. ISBN 1-874907-29-3.

** Southern African Plant Red Data Lists, Janice Golding (2002), SABONET, Pretoria, hard cover, A4, 237 pp. ISBN 1-919795-64-2.

*** SA Threatened Species Programme (TSP) Interim Red Data List .xls file (October 2007).


Last Updated: Dec 2007
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2007 Derek Tribble, London, UK