Leichhardtia

Gâteblé, Gildas, Meve, Ulrich & Liede-Schumann, Sigrid, 2023, A new threatened New Caledonian Leichhardtia (Apocynaceae, Asclepiadoideae, Marsdenieae) species discovered from a TV programme and social media, Phytotaxa 591 (2), pp. 91-100 : 98

publication ID

https://doi.org/ 10.11646/phytotaxa.591.2.1

DOI

https://doi.org/10.5281/zenodo.7799729

persistent identifier

https://treatment.plazi.org/id/039F947A-FFE8-FF92-FF3F-B7FB62ABF7A3

treatment provided by

Plazi

scientific name

Leichhardtia
status

 

Key to the species of Leichhardtia View in CoL View at ENA of New Caledonica

1. Leaves linear, lanceolate, or very slenderly ovate, usually more than 4× as long as broad ...............................................................2

1’. Leaves ovate, elliptic, obovate or orbicular, usually less than 4× as long as broad ...........................................................................7

2. Plants erect, even apically not twining; leaves caducous, leaving conspicuous scars ...................................................... L. ericoides

2’. Plants ascending, at least apically twining, leaves not caducous .......................................................................................................3

3. Corolla not longer than 3 mm, leaves less than 4 cm long; internodes less than 2 cm long .............................................................4

3’. Corolla more than 3 mm long, leaves more than 6 cm long; internodes more than 3 cm long..........................................................5

4. Corolla greenish-yellow, campanulate, tube around 1/3 of total corolla length....................................................... L. neocaledonica

4´. Corolla whitish, narrowly urceolate, tube ovoid to tubular, at least 1/2 as long as total corolla length................................. L. weari

5. Leaves more than 0.5 mm wide; inflorescences distinctly bostrychoid (check for scars that fallen pedicels left); floral buds cylindrical; corolla lobes not ciliate ............................................................................................................................ L. mackeeorum

5’. Leaves less than 0.5 mm wide; inflorescences sciadioidal; floral buds conical or cylindrical; corolla lobes ciliate or not ..............6

6. Shoots glabrous; inflorescences sessile; floral buds conical, corolla lobes not ciliate................................................... L. assimulata

6’. Shoots with an indumentum; inflorescences with at least 5 mm long peduncle; floral buds cylindrical, corolla lobes ciliate ........... ................................................................................................................................................................................. L. neomicrostoma

7. Plants erect, not exceeding 30 cm; leaves suborbicular, abaxially with protruding rhachis ............................................. L. kaalensis

7’ Plants twining, exceeding 30 cm; leaves of various shapes, but not suborbicular, abaxially without protruding rhachis.................8

8. Inflorescences richly branched, di-or monochasially cymose (at least the older ones) .....................................................................9

8’. Inflorescences usually sciadioidal, rarely slightly bostrychoid when old ........................................................................................11

9. Style-head rostrate, conspicuously protruding 4–6 mm long corolla............................................................................ L. paulforsteri

9’. Style-head umbonate or conical, not conspicuously protruding from the less than 4 mm long corolla .........................................10.

10. Leaves less than 4 cm long, less than 3 cm wide, elliptic, basally rounded; corolla lobes with regularly distributed trichomes; corona of free staminal lobes................................................................................................................................... L. guillauminiana View in CoL

10’. Leaves more than 5 cm long, more than 3 cm wide, ovate, floral buds ovoid; corolla lobes glabrous; corona of free staminal lobes and a wavy ring of connate staminal and interstaminal parts..................................................................................... L. tylophoroides

11. Inflorescences of more than 10 densely packed flowers, corolla brilliant red ......................................................... L. goromotoorum

11´. Inflorescences with less than 10 flowers or flowers not densely packed, flowers of different colours, but never red ....................12

12. Mature buds at least three times longer than wide; corolla at least 10 mm long, radiantly white; style-head elongated-conical ...13

12’. Mature buds less than three times longer than wide; of various colours, at the most with some radiantly white parts; style-head umbonate to conical..........................................................................................................................................................................14

13. Corolla 10–12 mm long ................................................................................................................................................ L. lyonsioides

13’. Corolla 30 mm long or more .............................................................................................................................................. L. speciosa

14. Corolla lobes at the most as long as tube, usually shorter; corolla shape urceolate.........................................................................15

14’. Corolla lobes at least as long as the tube, usually distinctly longer, corolla shape rotate ................................................................18

15. Plants covered with a soft, yellowish indumentum .........................................................................................................................16

15’. Plants (at least stems and leaves) glabrous; if indument present, then not yellowish .....................................................................17

16. Corolla purple red to purple brown, corolla tube more open, not explicitly fleshy or enclosing the corona; staminal corona lobes laminar and longer than broad; plants of Grande Terre.................................................................................................. L. dognyensis

16’. Corolla white to rose; upper rim of the corolla tube fleshy and protruding inwardly to create a suburceolate flower tube shape that strictly encloses the corona; staminal corona lobes protruding, broader than long; plants of Isle des Pins...................... L. kuniensis

17. Leaves> 9°cm long; peduncles and pedicels glabrous; buds almost globose ......................................................... L. koniamboensis

17’. Leaves not exceeding 6 cm length; peduncles and pedicels with indument; buds conical ......................................... L. oubatchensis

18. Flowers at least 10 mm diam., but distinctly fused, adaxially glabrous, but marginally ciliate............................... L. weberlingiana

18’. Flowers not more than 7 mm diam., corolla adaxially with trichomes, but marginally not ciliate..................................................19

19. Corolla> 5 mm diam., purplish-brown; lobes adaxially densely and regularly covered with white trichomes.............. L. nigriflora

19’. Corolla <5 mm diam., yellowish; lobes sparsely pubescent ............................................................................................ L. variifolia

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Malpighiales

Family

Phyllanthaceae

SubFamily

Asclepiadoideae

GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF