The following is a list of the collections made by Giess in species name order. The records are of species which occur in Rwanda (either as a native/naturalised species or as a cultivated species).
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| No | Species | Record date | Recorder(s) | Coll. | Det. | Conf. | Herbaria | Habitat | Location | Loc code | Outing code | Planted code | Country | QDS | Grid ref. | FZ Div | Alt. (m) | Notes | Lat | Long | Loc Acc Code |
| 95044 | Aerva leucura | 16 Jun 1971 | JWH Giess |
JWH Giess 11425 | JWH Giess | WIND |
Caprivi: At Dikundu (19,2 kilometres south of Andara] on harvested mahango field. | 0 | Namibia (Caprivi Strip) | 1821A2 | 0 | 60 cm high; Herb; Notes: Annual herb. Rich, grey-black soil. | -18.125000 | 21.375000 | 2 | ||||||
| 95057 | Ansellia africana | 10 Nov 1965 | JWH Giess |
JWH Giess 8237 | WIND |
Kunene, Opuwo District: Fruiting specimen of WG & H.J. Wiss 3270 - Live plants from Otjihangasema - Epupa, October 1960. Andara. | 0 | Namibia (Caprivi Strip) | 1821A2 | 0 | Notes: Lower lip pointed, boat shaped folded and margin very crenulate. Flower coloue intensier that at Andara. Plants fruiting in hort WG, Windhoek. | 2 | |||||||||
| 95061 | Asparagus racemosus | 20 Jun 1971 | JWH Giess |
JWH Giess 11460 | AA Mauve | WIND |
Caprivi: In omuramba at Dikundu (19,2 south of Andara). | 0 | Namibia (Caprivi Strip) | 1821A2 | 0 | Climber, more than 1 m high winding in bush. Petals very narrow (0,5 mm) white with reddish veins. Sweet scent. Fruit up to 7 mm diameter, more or less inconspicuously tri-lobed, 2 lobes not completely developed. | -18.125000 | 21.375000 | 2 | ||||||
| 95104 | Commelina erecta | 5 Apr 1978 | JWH Giess |
JWH Giess 15063 | JWH Giess | WIND |
Okavango, Rundu District: Andara. | 0 | Namibia (Caprivi Strip) | 1821A2 | 0 | Notes: Prostrate to upright. Shoots to 50 cm long. Sheaths often very small in leaf axils. Terminal sheaths round, boat-like. Flowers blue. Live plant together with Eulophobia sp. from Andara. Flowers in garden of W. Giess, Windhoek. Corr. nom.: SB 8.2003. | -18.125000 | 21.375000 | 2 | ||||||
| 95122 | Cyclosorus interruptus | 22 Jun 1971 | JWH Giess |
JWH Giess 11526 | JWH Giess | WIND |
Okavango, Rundu District: Andara. On riverbank of side-arm of Okavango at Andara Mission Station. | 0 | Namibia (Caprivi Strip) | 1821A2 | 0 | pteridophyte; Notes: Fronds up to 60 cm long. Growing in or nearly in water. Common. Corr. nom.: E. Klaassen 23.07.07 | -18.125000 | 21.375000 | 2 | ||||||
| 95123 | Cymbopogon caesius subsp. caesius | 14 Jun 1971 | JWH Giess |
JWH Giess 11377 | JWH Giess | WIND |
Caprivi: In omuramba Dikundu at Dikubdu, 19.5 km south of Andara. | 0 | Namibia (Caprivi Strip) | 1821A2 | 0 | Graminoid; Notes: Tufted grass up to 1.20 m high. Very common. | -18.125000 | 21.375000 | 2 | ||||||
| 95147 | Distephanus divaricatus | 14 Jun 1971 | JWH Giess |
JWH Giess 11373 | WIND |
Caprivi: At Dikundu, 19,5 km south of Andara. | 0 | Namibia (Caprivi Strip) | 1821A2 | 0 | 4 m high; Tree; Notes: Dry woodland. Small tree, 4 m high. Bark grey, very corky. | -18.125000 | 21.375000 | 2 | |||||||
| 95196 | Heteropogon contortus | 16 Jun 1971 | JWH Giess |
JWH Giess 11433 | JWH Giess | WIND |
Caprivi: At Dikundu (19.2 km south of Andara) on harvested mahangu field. | 0 | Namibia (Caprivi Strip) | 1821A2 | 0 | Graminoid; Notes: Heavy grey-black clay soil. | -18.125000 | 21.375000 | 2 | ||||||
| 95205 | Hyparrhenia filipendula | 16 Jun 1971 | JWH Giess |
JWH Giess 11440 | HH Kolberg | WIND |
Caprivi: In omuramba at Dikundu (19.2 km south of Andara). | 0 | Namibia (Caprivi Strip) | 1821A2 | 0 | Graminoid; Notes: Up to 1.30 m high tufted grass in small stands. | -18.125000 | 21.375000 | 2 | ||||||
| 95207 | Hyperthelia dissoluta | 16 Jun 1971 | JWH Giess |
JWH Giess 11409 | JWH Giess | WIND |
Clay, grey-black ground. | Caprivi: At Dikundu (19.2 km south of Andara, on haversted mahangofield). | 0 | Namibia (Caprivi Strip) | 1821A2 | 0 | Perennial. | -18.125000 | 21.375000 | 2 | |||||
| 95208 | Imperata cylindrica | 15 Jun 1971 | JWH Giess |
JWH Giess 11392 | JWH Giess | WIND |
Caprivi: At Dikundu, 19.5 km south of Andara. | 0 | Namibia (Caprivi Strip) | 1821A2 | 0 | Graminoid; Notes: Dry woodland. | -18.125000 | 21.375000 | 2 | ||||||
| 95288 | Piliostigma thonningii | 16 Jun 1971 | JWH Giess |
JWH Giess 11415 | JWH Giess | WIND |
Caprivi: Andara. At Dikundu, 19.2 km South of Andara on ploughed Mahango field. On grey-black loamy soil. | 0 | Namibia (Caprivi Strip) | 1821A2 | 0 | Notes: Multi-stemmed plant, up to 1.80 m high. Shoots from tree stump. | -18.125000 | 21.375000 | 2 | ||||||
| 95312 | Scadoxus multiflorus subsp. multiflorus | 1 Nov 1978 | JWH Giess |
JWH Giess 13606 | DA Snijman | WIND |
Caprivi, Katima Mulilo: Flowers in garden of W.Giess, Windhoek. | 0 | Namibia (Caprivi Strip) | 1821A2 | 0 | Peduncle 15 cm high, 3/4 without spots. Flowers bright red. | 2 | ||||||||
| 95328 | Striga asiatica | 20 Jun 1971 | JWH Giess |
JWH Giess 11472 | JWH Giess | WIND |
Caprivi: Andara. In grass stand of the Omuramba at Dikundu (19.2 km south of Andara). | 0 | Namibia (Caprivi Strip) | 1821A2 | 0 | Herb; Notes: Small, up to 15 cm high,herb. Flowers very small, bright vermilion.Quoted in: Kew Bull. 41(1): 207 | -18.125000 | 21.375000 | 2 |