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Electronic Flora of South Australia genus Fact Sheet

Family: Loranthaceae
Amyema

Citation: Tieghem, Bull. Soc. Bot. Fr. 41:499 (1894).

Derivation: Greek a, negative; myeo, I instruct, initiate; alluding to a genus not previously recognised; cf. the Greek amyema (neuter), those not initiated.

Synonymy: Not Applicable

Common name: None

Description:
Glabrous or tomentose; haustorial attachments with or without epicortical (i.e. on the bark of the host) runners; leaves flat or terete, when flat usually curvinerved.

Inflorescence axillary, primarily a pedunculate many-rayed umbel of triads but variously reduced, especially to a head or simple umbel; bracts single under each flower; petals free (in Australia), mostly 4-6; anthers basifixed, immobile, introrse, 2- or 4-locular; style usually articulate at the base; fruit globular to ellipsoid.

Distribution:  About 100 species ranging from Malaya and the Philippines to Australia and the western Pacific; 36 species in Australia.

Biology: No text

Key to Species:
1. Leaves terete
 
2. Flowers in dyads; corolla usually 4-merous; free part of the filament shorter than the anther; hosts Grevillea or Hakea
A. gibberulum 2.
2. Flowers in triads; corolla usually 5-merous; free part of the filament longer than the anther
 
3. Inflorescence and flowers tomentose; host Casuarinaceae
A. linophyllum 4.
3. Inflorescence and flowers glabrous; host usually Acacia
A. preissii 10.
1. Leaves flat
 
4. Inflorescence a pedunculate simple umbel; haustorial attachments produced from epicortical runners; hosts Eucalyptus or Melaleuca
A. sanguineum 12.
4. Inflorescence a pedunculate umbel of triads or tetrads, or contracted to a head; haustorial attachment without epicortical runners
 
5. Inflorescence a pedunculate head of 3-6 closely sessile flowers; host Acacia
 
6. Flowers in a single group of 3-5; central flower ebrocreate
A. fitzgeraldii 1.
6. Flowers in 2 opposite triads; all flowers bracteate
A. maidenii 5.
5. Inflorescence an umbel of 2 or more triads or tetrads
 
7. Rays in the umbel 2
 
8. Corolla glabrous
 
9. Corolla in the mature bud longitudinally ridged at the apex, not inflated at the base; leaf lamina mostly more than 10 mm wide; hosts commonly Santalacaeae and Loranthaceae
A. miraculosum 8.
9. Corolla in the mature bud not longitudinally ridged, inflated at the base; leaf lamina mostly less than 6 mm wide; host Melaleuca
A. melaleucae 6.
8. Corolla sparsely to densely tomentose; host Acacia
 
10. Central bracts of the triads more than 3 mm long; calyx uniformly cylindrical
A. hillianum 3.
10. Central bracts of the triads less than 3 mm long; calyx abruptly widened just below the limb
A. quandang 11.
7. Rays in the umbel usually more than 2
 
11. Triads with all flowers pedicellate; hosts Eucalyptus, rarely Acacia
A. miquelii 7.
11. Triads or tetrads with the central flower sessile
 
12. Corolla glabrous; hosts mostly Santalaceae or Loranthaceae
A. miraculosum 8.
12. Corolla rusty-tomentose; hosts Eucalyptus, rarely Acacia
A. pendulum 9.

Author: Not yet available


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