4.3.4 Introduced flora species Introduced flora species were generally restricted to the eastern half of the project area, with the most abundant weed populations noted adjacent to and within the unnamed mine spoil dump adjacent to the Open Cut Pit. Eight of the introduced flora species observed within the project area are considered restricted matter flora species under the Biosecurity Act. These species included: Lantana camara (creeping Lantana), Cenchrus setaceus (fountain grass), Harrisia martinii (Martin apple cactus), Tecoma stans (yellow bells), Sporobolus natalensis (giant rats tail grass), Opuntia tomentosa (velvety tree pear), Cryptostegia grandiflora (rubber vine) and Lantana camara (Lantana). The latter three species are also considered Weeds of National Significance (WoNS). Each species is further discussed in Table 4.5.
Table 4.5
Restricted matters and WoNS within the project area
Biosecurity Act Category 3
Representative photo
Name
WoNS Field observations
This species was the most abundant restricted matter in the project area. Where present, the species was generally observed as the dominant ground cover, occasionally creating dense homogenous swards. The species was most abundant in the south – south eastern extents of the project area, but was noted else where on site as isolated tussocks along road verges. The species generally presented as mature, healthy individuals with evidence of active or recent reproduction (seed heads). This species was noted at three locations within the project area. The species was only noted as isolated, young recruiting individuals.
No
Cenchrus setaceus (fountain grass)
Category 3
Yes
Cryptostegia grandiflora (rubber vine)
This species was noted at four locations across the eastern extent of the project area. At all locations the species was observed as solitary individuals. All individuals presented as healthy, with two currently in fruit.
Category 3
No
Harrisia martinii (Martin apple cactus)
GHD | Heritage Minerals Pty Ltd | 12626510 | Heritage Minerals Mount Morgan 24 This document is in form. The contents, including any opinions, conclusions or recommendations contained in, or which may be implied from, this document must not be relied upon. GHD reserves the right, at any time, without notice, to modify or retract any part or all of the document. To the maximum extent permitted by law, GHD disclaims any responsibility or liability arising from or in connection with this document.
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