Edit History
Isoetes nigroreticulata Verdc. [family ISOETACEAE]
Date Updated: 19 August 2007
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical East Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical East Africa, page 1, (2005) Author: B. Verdcourt, B.Sc., Ph.D.
Names
Isoetes nigroreticulata Verdc. [family ISOETACEAE], sp. nov. ob velum completum I. tenuifoliae Jermy affinis sed velo nigro reticulato differt. Type: Fort Hall District, Thika, N side of Thika R., E of Nairobi – Muranga road opposite to Horticultural Research Station turn-off, Faden & Kabuye 71/550 (K!, holo., EA, iso.)
Isoetes tenuifolia [family ISOETACEAE], sensu Faden in U.K.W.F. ed. 2: 39 (1994), non Jermy
Information
Annual (fide Faden), almost completely submerged or on mud. Corm 2–3-lobed; leaves densely tufted, 3–16 cm long, 0.7–8 mm wide at middle; ligule narrowly triangular, 2 mm long. Velum complete, shiny black and reticulate, the adjacent leaf margin pale and thin, 1–2 mm wide above, narrower in sporangial area. Megaspores with rather scattered tubercles on large face, 3 smaller faces with small low indistinct tubercles or almost smooth.
Range
DISTR. K 4 not known elsewhere
Altitude range
± 1520 m
Distribution
KENYA Fort Hall District Thika, N side of Thika R., E of Nairobi – Muranga road, opposite to Horticultural Research Station, 1 July 1971, Faden et al. 71/544! & same locality 11 July 1971, Faden & Kabuye 71/550! & same locality 11 July 1971, Faden & Kabuye 71/571!
Notes
I have examined the type of I. tenuifolia Jermy from Ghana (Hall 3728; BM, holo., K!, iso.) and it has a pale velum different in colour and sculpture. I do not think they are conspecific.
Date Updated: 19 August 2007
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical East Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical East Africa, page 1, (2005) Author: B. Verdcourt, B.Sc., Ph.D.
Names
Isoetes nigroreticulata Verdc. [family ISOETACEAE], sp. nov. ob velum completum I. tenuifoliae Jermy affinis sed velo nigro reticulato differt. Type: Fort Hall District, Thika, N side of Thika R., E of Nairobi – Muranga road opposite to Horticultural Research Station turn-off, Faden & Kabuye 71/550 (K!, holo., EA, iso.)
Isoetes tenuifolia [family ISOETACEAE], sensu Faden in U.K.W.F. ed. 2: 39 (1994), non Jermy
Information
Annual (fide Faden), almost completely submerged or on mud. Corm 2–3-lobed; leaves densely tufted, 3–16 cm long, 0.7–8 mm wide at middle; ligule narrowly triangular, 2 mm long. Velum complete, shiny black and reticulate, the adjacent leaf margin pale and thin, 1–2 mm wide above, narrower in sporangial area. Megaspores with rather scattered tubercles on large face, 3 smaller faces with small low indistinct tubercles or almost smooth.
Range
DISTR. K 4 not known elsewhere
Altitude range
± 1520 m
Distribution
KENYA Fort Hall District Thika, N side of Thika R., E of Nairobi – Muranga road, opposite to Horticultural Research Station, 1 July 1971, Faden et al. 71/544! & same locality 11 July 1971, Faden & Kabuye 71/550! & same locality 11 July 1971, Faden & Kabuye 71/571!
Notes
I have examined the type of I. tenuifolia Jermy from Ghana (Hall 3728; BM, holo., K!, iso.) and it has a pale velum different in colour and sculpture. I do not think they are conspecific.
Date Updated: 19 August 2007
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical East Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical East Africa, page 1, (2005) Author: B. Verdcourt, B.Sc., Ph.D.
Names
Isoetes nigroreticulata Verdc. [family ISOETACEAE], sp. nov. ob velum completum I. tenuifoliae Jermy affinis sed velo nigro reticulato differt. Type: Fort Hall District, Thika, N side of Thika R., E of Nairobi – Muranga road opposite to Horticultural Research Station turn-off, Faden & Kabuye 71/550 (K!, holo., EA, iso.)
Isoetes tenuifolia [family ISOETACEAE], sensu Faden in U.K.W.F. ed. 2: 39 (1994), non Jermy
Information
Annual (fide Faden), almost completely submerged or on mud. Corm 2–3-lobed; leaves densely tufted, 3–16 cm long, 0.7–8 mm wide at middle; ligule narrowly triangular, 2 mm long. Velum complete, shiny black and reticulate, the adjacent leaf margin pale and thin, 1–2 mm wide above, narrower in sporangial area. Megaspores with rather scattered tubercles on large face, 3 smaller faces with small low indistinct tubercles or almost smooth.
Range
DISTR. K 4 not known elsewhere
Altitude range
± 1520 m
Distribution
KENYA Fort Hall District Thika, N side of Thika R., E of Nairobi – Muranga road, opposite to Horticultural Research Station, 1 July 1971, Faden et al. 71/544! & same locality 11 July 1971, Faden & Kabuye 71/550! & same locality 11 July 1971, Faden & Kabuye 71/571!
Notes
I have examined the type of I. tenuifolia Jermy from Ghana (Hall 3728; BM, holo., K!, iso.) and it has a pale velum different in colour and sculpture. I do not think they are conspecific.
![Isoetes nigroreticulata Verdc. [family ISOETACEAE]](/fsi/img/misc/plants/static_thumbs/flora_tropEA_icon96.jpg)
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