Saturday, 27 July 2019

Checking a recent burn at the Western Heights (Thursday 25 July 2019)

As it was close to the time of year for our annual hunt for Euphorbia bupleurifolia plants, we headed off to the recently burned portion of the Western Heights to see what had emerged since the burn some two weeks earlier. We know enough not to expect much so soon after a burn but some species emerge so quickly that delaying much longer would likely mean we would miss their flowering.

After battling along the track to the Western Heights - several small trees had blown across the track requiring some teamwork to get the obstacles out of the way - we parked and started walking towards the burned areas. Soon we were passing the delicate nodding heads of Disa baurii protruding above the unburned grass.

Discussing how to move a fallen tree (Photo: Gail B-W)

Disa baurii
Once we reached the edge of the burn we set off across the stream and wetland. It was not long before we were finding Cyrtanthus breviflorus. When this species grows in a wetland, it is anything but short and we could see many of these robust stalks. Many had already finished flowering. It is amazing how quickly these plants respond to a well-timed burn. Also present in numbers and growing in clumps were Gerbera kraussii - now sunk into the dumping ground of Gerbera ambigua.

The wetland form of Cyrtanthus breviflorus

Gerbera kraussii - now sunk into Gerbera ambigua

An emerging bud of Gerbera krausii

An emerging bud of Merwilla plumbea seeing the light of day for the first time

Once we had staggered through the heavily tussocked wetland, we emerged onto more even dry ground and started seeing little yellow flashes of Gazania krebsiana, many of which were flowering in an almost leafless state. We were lucky to catch a Gaudy Commodore butterfly sating itself on nectar from these flowers.

Gazania krebsiana

A Gaudy Commodore visiting a Gazania krebsiana
After searching for some time, Anne's shout alerted us and we walked over to see the first of the Euphorbia bupleurifolia plants of this season. When the veld is freshly burned, these plants are very obvious but once the grass and other forbs grow back, they are very hard to find. Here we also found the first of the Othonna natalensis buds.

One of the many Euphorbia bupleurifolia

Othonna natalensis bud
We walked on towards the Umtamvuna River gorge passing through an area where there were many dead stalks of small Protea caffra shrubs. Their dead flower heads shone in the winter sun and the ground was littered with their seeds. Gail and Tracy posed several rodent skulls on a bed of these seeds.

Rodent skulls on a bed of Protea seeds - sounds like a restaurant menu item (Photo: Gail B-W)
The remnants of a Protea caffra inflorescence

Just a bit more effort will do it! (Photo: Gail B-W)


We had our lunch perched above the Umtamvuna gorge and then worked our way around a hillock heading back towards the vehicles. There was a rather unusual rock sculpture at the top of the hill. As we walked on we came across several more Euphorbia bupleurifolia plants. Clustered in a crack in a rock outcrop was a small clump of Albuca setosa with emerging buds.


An agonised face sculpted in the rock

Straggling on the way home

Posed in front of the imposing cliffs above the Umtamvuna River

Albuca setosa buds

Participants: Alf H, Anne B-W, Anne S, Gail B-W, Graham G, Kate G, Maggie A, Mark G, Tracy T.

Revisiting Dovyalis at Manilkara Meander (Sunday 21 July 2109)

Over the last few months Richard Boon has been working with Braam van Wyk on the genus Dovyalis and in the process had corresponded with us to get access to collections of this genus in the Hugh Nicholson/Tony Abbott (PCE) herbarium at Umtamvuna Nature Reserve. We then arranged a meeting at the herbarium so he could look at all the Dovyalis vouchers but in particular he was interested in Dovyalis lucida as some of the specimens seem morphologically different from many others he has seen. He and Errol Dowes from Ethekweni Municipality joined us on a crisp and bright winter morning. We spent a little time going through the vouchers and Richard renamed a few of them for us.

We were then joined by Anne, Debbie and Tracy and we set off to Manilkara meander where we had previously collected Dovyalis lucida along the cliff line as Richard wanted to get a feel for these plants in the field. As we walked along we kept our eyes open for other interesting plants. We found a single Homalium rufescens flowering and several Petopentia natalensis in bud.


Homalium rufescens

Petopentia natalensis buds


We then found the first of the Dovyalis lucida trees and Richard could get a good look at the giss of the plant. We looked very carefully for spines on the branches and any serrations on the leaves, common features of Dovyalis. There was also a hunt for coppice growth as these characters are frequently exaggerated there. We failed to find any such features on any of the first few trees we inspected and it was only when we had looked at about 30 trees that Richard found a leaf with a single serration and one or two spines on a stalk. Subsequently we found another, larger tree with several spines on the trunk. However spines seem to be present on fewer than 5% of the trees examined in this sub-population. 

Unfortunately none of the trees showed any signs of flowers or fruit as it was probably still a bit early. This means further visits in the next month or two to ensure we can collect sufficient material for Richard to study to verify if this sub-population of Dovyalis lucida is consistent with collections from elsewhere or whether this might be something different.


Spines on the trunk of  Dovyalis lucida

Leaves on Dovyalis lucida

A cluster of Erica cerinthoides

Looking down into the Umtamvuna River gorge


Participants: Anne S, Debbie K, Errol D, Graham G, Kate G, Richard B, Tracy T.

Sunday, 21 July 2019

Flowering now (July 2019)

Acalypha peduncularis

Acokanthera oblongifolia

Afroaster hispidus

Albuca setosa

Allocassine laurifolia

Allophylus dregeana  fruit

Aloe maculata

Anthospermum galpinii

Argyrolobium tomentosum

Ascolepis capensis

Berkheya insignis

Berkheya speciosa

Buchnera dura

Callilepis laureola

Carissa bispinosa

Cephalaria oblongifolia

Clutia abyssinica var nov. fruit

Combretum kraussii

Crassula nudicaulis

Cyanotis speciosa

Cyrtanthus brachyscyphus

Cyrtanthus breviflorus

Cyrtanthus contractus

Dianthus mooiensis

Dichrostachys cinerea

Dimorphotheca fruticosa

Diospyros scabrida

Diospyros villosus

Disa similis

Dissotis canescens

Eulophia clitellifera

Eulophia parviflora

Euphorbia bupleurifolia

Gazania krebsiana

Gerbera ambigua

Gerbera kraussii (now sunk into G. ambigua)

Gerbera natalensis

Gerrardina foliosa

Gladiolus inandensis

Gladiolus longicollis

Graderia scabra

Hebenstretia comosa

Helichrysum aureum var monocephalum

Helichrysum griseum

Helichrysum palidum

Helichrysum pilosellum

Hesperantha sp. aff grandiflora

Holothrix orthoceras

Hypoxis argentea

Hypoxis colchicifolia

Hypoxis hemerocallidea

Kniphofia coddiana

Kniphofia rooperii

Lasiosiphon kraussianus

Ledebouria revoluta

Lobelia tomentosa

Lotononis bachmanniana

Merwilla plumbea

Mimusops obovata

Neocussonia (Schefflera) umbellifera fruits

Ocimum obovatum

Ophioglossum reticulatum

Ornothogalum juncifolium

Orthochilus foliosus

Osmunda regalis

Osteosperrmum imbricatum

Othonna natalensis

Osyridicarpos schimperianus

Oxygonum dregeanum

Pelargonium luridum

Pentanisia prunelloides

Phylica natalensis

Pterocelastrus echinatus

Raphionacme galpinii

Schizaea pectinata

Schizoglossum atropurpureum ss virens

Schrebera alata fruits

Searsia pondoensis

Senecio bupleurioides

Senecio discodregeanus

Senecio oxyriifolius

Tritonia gladiolaris

Ursinia tenuiloba

Wurmbea cf kraussii