Mackinlaya macrosciadea—Blue Umbrella—ARALIACEAE

Mackinlaya macrosciadea

Link to Images on Flickr.

Habitat—Grows as an understory shrub in and on the margins of a variety of different types of well developed rain forest. Usually flowers and fruits as a slender single–stemmed shrub about 1–3 m tall.

Distribution—Endemic to Australia, occurs in Northern Territory, North East Queensland and southwards to coastal central and south-eastern Queensland. Altitudinal range from near sea level to 1100 m.

Description—Shrub to 6 meters tall.

Local occurrences

Raintrees Diamond Beach

Leaves.—Compound, alternate, palmate, leaf petioles much longer than the leaflet stalks. Leaflet stalks variable in length even on the one compound leaf. Leaflet blades about 8.5 to 16 by 3.5 to 6 cm.

Seedlings— Cotyledons about 20 to 32 by 15 to 18 mm. First pair of leaves alternate, ovate, margins usually toothed. Petiole bases clasping the stem. At the tenth leaf stage: leaves usually palmately compound with 3 to 5 leaflets. Leaflet margin with 2 to 5 teeth on each side of the leaflet towards the apex. Petiole winged towards the base and clasping the stem.

Mackinlaya macrosciadea
Mackinlaya macrosciadea

Inflorescence.—Borne in umbels which are arranged in umbels. Flowers about 2.5 mm diam. White.


Fruit.—Surface glaucous or blue–grey. Fruits borne in umbels which are arranged in umbels. Fruits laterally compressed and usually ± 2–lobed, wider than long, about 9 to 10 by 11 to 13 mm, calyx lobes and styles persistent at the apex. Embryo very small, about 0.6 to 0.8 mm long. Cotyledons about as wide as the radicle.


Mackinlaya macrosciadea