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Group (f)
The next 3 species are related to each other and to aristata, but the exact relationships are at the moment obscure and probably go back to Australian congeners unknown to the writer.
7. Th. decora Cheesmn. Manl. N.Z. Flor., 1, 1906, 1151
Up to 40 cm. high. Leaf up to 20 cm. long, recurved, concave with exterior ridges, linear-acuminate. Flowers 1–9, dark blue, the lateral petals irregularly spotted with brown, perianth segments up to 12 mm. long. Column inclined backwards, blue with paler margins. Midlobe higher than the anther, slightly cucullate, almost black with finely denticulate margin, back studded with very dark, quite conspicuous tubercles. Lateral lobes secondary, short, horizontal, with thick erect tnfts of white cilia.
Distribution. Endemic—2. (North Auckland), 3a. (Kaipara), 3b. (Waikato). 3c. (Thames), 5. (Volcanic Plateau), occasional throughout, becoming common about Mt. Ruapehu. 6. (Egmont-Wanganui), Mt. Egmont, 12.1948. O. E. Gibson. 7. (Ruahine-Cook), Wallaceville Hill, 12.1946. J. Johnston. Silverstream, 11.1949, A. P. Druce.
Flowers Dec-Jan., sea-level–4,500 ft.; tussock and roadsides and about the margins of swamps and bogs, occasional in scrub. Lectotype in Herb. Cheeseman, in the Auckland Museum. Summit of Mt. Kakaramea, 1.1905, T. F. Cheeseman. Sheet No. 3361.
8. Th. pachyphylla Cheesmn. Manl. N.Z. Flor., 1. 1906, 1151
Up to 40 cm. high. Leaf up to 30 cm. long, recurved, concave with exterior ridges, linear-acuminate. Flowers 1–15, bright blue, shading to mauve, perianth segments up to 12 mm. long. Column erect, the upper portion red-brown and paling towards the top. Midlobe as high as the anther, hardly eucullate, pinkish-yellow with irregularly and minutely denticulate, more or less truncate margin. Lateral lobes secondary, short, oblique with coarse bright-yellow flmbriae.
Distribution. Endemic—4. (East Cape), Lake Waikaremoana, 11.1949, C. Trevarthen. 5. (Volcanic Plateau), National Park and Erua. 12.1920, H. B. Matthews. Pokaka, 11.1949, J. B. Irwin. 6. (Egmont-Wanganui), Pouakai Ranges, 11.1948, O. E. Gibson. Waitaanga, 11.1949, J. B. Irwin. Waitotara, 12.1949, J. B. Irwin. Also common throughout the whole of the South and Stewart Islands.
Flowers Nov.–Dec., sea-level–3,000 ft.; large colonies in tussock or scrub and along roadsides; related to and probably having a common origin with Th. caesia Petr. Lectotype in Herb. Cheeseman, in the
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1. Caleana minor, natural size, a, flower from side: b, lamina of labellum from side. c, lamina of labellum from above; d, column from front.
2. A denochilus gracilis. natural size, e, flower from side; f, column and labellum from side; g, labellum from half-front; h, column from front; j, column from side. (with one column-wing removed).
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1. Spiranthes sinensis, natural size. a, flower from front; b, column from front; c, top of column from back.
2. Microtis unifolia, natural size (young raceme), d, raceme at maturity; e, flower from side; f, labellum from front; g, column from front; h, column from side j, labellum of M. parviflora from front.
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Orthoceras strictum, natural size, a, flower from side; b, labellum from above; c, column from back; d, column from side.
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Th. longifolia. The first illustration.
Drawn on board the Endeavour, under the direction of Sir Joseph Banks: from plants collectted by himself and Solander from the East Cape aren, towards the end of October, 1769. The first Thelymitra to be seen by European eyes.
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Th. carnca imberbis
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A. Th. venosa typica. Column from side.
B. Th. venosa typica. Column from back.
C. Th. venosa typica. Column from front.
D. Th. venosa cedricsmithii. Column from back.
E. Th. venosa cedricsmithii. Column from front.
F. Th. venosa cyana. Column from back.
G. Th. venosa cyanea. Column from side.
H. Th. venosa cyanea. Column from front.
J. Th. matthewsii. Calli in sinus of lateral lobes.
K. Th. matthewsii. Column from side.
L. Th. matthewsii. Column from front.
M. Th. pulchella. Column from side.
D. E. after Smith. F, G, H, after IIoker, J, K, L, after Nlcholls.
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A. Th. pulchella. Column from back.
B. Th. pulchella. Column from front.
C. Th. pulchella. Column from half front.
D. Th. carnea imberbis. Column from front.
E. Th. carnea imberbis. Column from side.
F. Th. carnea imberbis. Column from above.
G. Th. ixioides typica. Column from side.
H. Th. ixioides typica. Column from front.
I. Th. aemula. Column from side.
K. Th. aemula. Column from back.
L. Th. aemula. Column from front.
M. Th. aemula. Column from above.
G, H, after Scammel.
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A. Th. decora. Column from side.
B. Th. decora. Column from front.
C. Th. decora. Column from back.
D. Th. pachyphylla. Column from side.
E. Th. pachyphylla. Column from back.
F. Th. pachyphylla. Column from front.
G. Th. pachyphylla. Column from above.
H. Th. pachyphylla. Top of column from half back.
J. Th. caesia. Column from front.
K. Th. caesia. Column from side.
L. Th. caesia. Column from back.
M. Th. aristata. Column from side.
N. Th. aristata. Column from front.
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A. Th. aristata. Column from back.
B. Th. longifolia forsteri. Column from front.
C. Th. longifolia forstert. Column from side.
D. Th. longifolia forsteri. Column from above.
E. Th. longifolia forsteri. Secondary cilia.
F. Th. longifolia stenopetala. Column from side.
G. Th. longifolia stenopetala. Column from back.
I. Th. longifolia stenopetala. Secondary cilia.
J. Th. longifolia intermedia. Secondary cilia.
K. Th. pauciflora. Column from side.
L. Th. pauciflora. Column from front.
M. Th. pauciflora. Column from half front.
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A. Th. pauciflora. Column from above.
B. Th. sanscilia. Column from side.
C. Th. sanscilia. Column from half front.
D. Th. sanscilia. Column from back.
E. Th. sanscilia. Column from above.
F. Th. pachyphylla (South Island Jordanon) from an upper (Immature) bud.
G. Th. pachyphylla from a lower bud on the same plant, showing of differences in. column form during development.
H. Th. acmula. Diagrammatic section of column, showing arrangement of parts.
LL. base of lateral lobe. ML. midlohe. AC, anther connective. A, anther, R. rostellum. S. stigma.
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Auckland Museum. Vicinity Westport, 11.1905, W. Townson. Sheet No. 3376(1).*
9. Th. caesia Petr. Trans. N.Z. Inst., 51, 1919, 107
Up to 90 cm. high. Leaf up to 32 cm. long, recurved, concave with exterior ridges, linear-acuminate. Flowers 1–6, deep mauve with darker striae, perianth segments up to 15 mm. long. Column inclined backwards, reddish-blue with darker striae. Midlobe erect, as high as or higher than the anther, but not cucullate, reddish-brown with paler margins. Lateral lobes secondary, short, oblique, with bright yellow fimbriae.
Distribution. Endemic—2. (North Auckland), 3a. (Kaipara), common throughout, from Kaikohe to the Waitakere Ranges, Matthews, Irwin, Bartlett, Hatch, etc. 5. (Volcanic Plateau), National Park, 12.1948, J. B. Irwin. 7. (Ruahine-Cook), Wallaceville Hill, 12.1946, J. Johnston. Silverstream and Upper Hutt, 11.1949, A. P. Druce. 10. (North-western), Westport, 12.1947, W. R. B. Oliver.
Flowers Oct.–Dec., sea-level–2,000 ft.; scattered in scrub or tussock and along roadsides. Related to Th. pachyphylla Cheesmn.
[Footnote] * Since writing the above, Th. pachyphylla has been found to consist of two distinct jordanons, one in the North Island (Plate 79, Figs. D–H) and one in the South and Stewart Islands (Plate 81, Figs. F–G). Th. venosa typica and Th. ixioides typica have been recorded from New Caledonia.