Diario del proyecto Searsia in southern Africa

Notes:

References:

• A taxonomic study of Rhus (Anacardiaceae) in Southern Africa R.O. Moffett. 1990. PhD Thesis, Univ Stellenbosch - not digiitized, but: https://scholar.sun.ac.za/items/ffc2b4f0-b8c0-4fdc-89d4-d467d3f42af6
• Flora of southern Africa 19 (3)(1): Anacardiaceae. Rhys by R.O. Moffett 1993. - https://archive.org/stream/floraofsoutherna1931unse/floraofsoutherna1931unse_djvu.txt (no illustrations).
• Names of the southern African species of Rhus (Anacardiaceae) and their etymology. R.O. Moffett. 1994. Bothalia 24: 67-76 https://journals.abcjournal.aosis.co.za/index.php/abc/article/view/753/704
• Name changes in the Old World Rhus and recognition of Searsia (Anacardiaceae) R.O. Moffett. 2007. Bothalia 37: 165-175 http://opus.sanbi.org/bitstream/20.500.12143/7586/1/Bothalia37_2_2007.pdf

Status as at October 2023

22,908 observations by 2,714 observers

70 species with 37,391 identifiications by 664 identifiers.

• 4,248 identified to Genus (19%) Help ID them here
• 6,070 identified to species (26%), but needing confirmation Help confirm them here
• 12,044 identified to Research Grade (53%) Help review them here

Top Species

1801 Searsia lucida Glossy Currantrhus

1399 Searsia glauca Blue Kunirhus
1358 Searsia laevigata Dune Currantrhus
1239 Searsia lancea Karee
1207 Searsia crenata Bluefruit Currantrhus

1184 Searsia tomentosa Bicolour Currantrhus
1085 Searsia pyroides Common Currantrhus
1027 Searsia chirindensis Red Currant-Rhus

962 Searsia rosmarinifolia Rosemary Currantrhus
804 Searsia pallens Ribbed Kunirhus
741 Searsia angustifolia Willow Karee

459 Searsia dentata Nana Currantrhus
444 Searsia leptodictya Mountain Karree

399 Searsia magalismontana Mountain Currantrhus
380 Searsia pendulina White Karee
333 Searsia discolor Grassveld Currantrhus
313 Searsia incisa Rubrub Currantrhus

297 Searsia pterota Wing Currantrhus
293 Searsia undulata Namaqua Kunirhus
270 Searsia scytophylla Redflower Currantrhus
267 Searsia rigida Rock Currantrhus
262 Searsia burchellii Karoo Kunirhus
205 Searsia dissecta Langsteel Currantrhus

189 Searsia erosa Broom Karree
189 Searsia longispina Thorn Currantrhus
189 Searsia rehmanniana Bluntleaf Currantrhus
164 Searsia zeyheri Blue Currantrhus

105 Searsia pentheri Common Crowberry
101 Searsia cuneifolia Kogelberg Currantrhus
101 Searsia tumulicola Hardleaf Currantrhus

*** too few observations to train the CV AI ***
95 Searsia nebulosa Coastal Currantrhus
89 Searsia gueinzii Thorny Karee
73 Searsia refracta Roughleaf Currantrhus
64 Searsia populifolia Gariep Currantrhus
54 Searsia ciliata Sour Kunirhus
52 Searsia natalensis Natal Karreerhus

48 Searsia tenuinervis Roll-leaf Currantrhus
38 Searsia transvaalensis Transvaal Currantrhus
37 Searsia divaricata Rustyleaf Currantrhus
35 Searsia pondoensis Pondo Currantrhus
35 Searsia keetii Slender Currantrhus

27 Searsia rimosa Cederberg Currantrhus
20 Searsia rudatisii Rough Dwarf Currantrhus
19 Searsia acocksii Pondo Climbing Currantrhus
19 Searsia carnosula False Nanaberry

16 Searsia dregeana Wire Kunirhus
15 Searsia rogersii
14 Searsia grandidens Sharptooth Currantrhus
14 Searsia montana Drakensberg Karree

13 Searsia gerrardii River Currantrhus
13 Searsia marlothii Bitter Karree
12 Searsia batophylla Bramble Currantrhus
11 Searsia harveyi Harveys Currantrhus
10 Searsia tridactyla Sour Karee

9 Searsia pygmaea
8 Searsia longipes Longstalk Currantrhus
7 Searsia horrida Redthorn Currantrhus
6 Searsia engleri Velvet Karee
6 Searsia gracillima
6 Searsia kwazuluana
6 Searsia sekhukhuniensis Sekhukhuni Karee
6 Searsia wilmsii

3 Searsia albomarginata White-edge Currantrhus
3 Searsia fastigata Broom Currantrhus
3 Searsia stenophylla Small-leaf Currantrhus
2 Searsia bolusii
2 Searsia krebsiana False Sour Currantrhus

1 Searsia dracomontana Drakensberg Dwarf Currantrhus
1 Searsia problematodes
1 Searsia crenulata

Not recorded yet:
0 Searsia lucens (Zambezi Karee)
0 Searsia maricoana
0 Searsia quartiniana (Glossy Velvet Karee)
0 Searsia volkii (Naukluft Crowberry)

Leaflet venation

(from Moffett)
In the description of the taxa, the following terms, after Hickey (1973), are used to describe the various forms of pinnate venation of the leaflets:

Craspedodromous

secondary veins terminating at the margin.

• Simple: all of the secondary veins and their branches terminating at the margin.
• Semi-: secondaries branching just within the margin, one of the branches terminating at the margin, the other joining the superadjacent secondary.
• Mixed: some of the secondaries terminating at the margin and an approximately equal number of (usually inter-vening) secondaries otherwise.

Camptodromous

secondary veins not terminating at the margin.

• Brochidodromous: secondaries joined together in a series of prominent arches.
• Reticulodromous: secondaries losing their identity towards the leaf margin by repeated branching into a vein reticulum.
• Kladodromous: secondaries freely ramified toward the margin.

Hyphodromous

all but the primary vein absent, rudimentary or concealed within the coriaceous mesophyll.

We have a rudimentary field guide. Anyone wanting to help with getting it useful is welcome.

https://www.inaturalist.org/guides/18203?view=card

What is needed?

• Tidy up scientific name display;
• Add in some diagnostics in the text
• Create a table of feature x species that we can add in to use as a key.

Anyone keen.