Desert Rice-Flower

Names and Synonyms

Common Names

• desert riceflower
• desert rice-flower

Scientific Names

Accepted name

Synonyms

• Banksia simplex

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant, known as Pimelea simplex, belongs to the kingdom Plantae within the phylum Streptophyta and the class Equisetopsida. As a member of the subclass Magnoliidae and the order Malvales, it is classified under the family Thymelaeaceae. Finally, its specific taxonomic placement is within the genus Pimelea.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a widespread distribution across several key regions of Australia. It can be found growing naturally throughout the state of New South Wales. Additionally, its presence extends northward into the coastal and inland areas of Queensland. The species is also documented within the southern territories of South Australia. Finally, its geographical range reaches into the various landscapes of Victoria.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Life history

The life history of Pimelea simplex is characterized by its status as an annual species, completing its entire developmental cycle within a single growing season. The life cycle begins with the germination of seeds in favorable soil conditions, followed by a period of vegetative growth where the plant establishes its structure. As an annual, it focuses its energy on rapid development to reach maturity, eventually transitioning into a reproductive phase where it produces flowers and seeds. Once the seeds have matured and been dispersed, the individual plant completes its life cycle and dies, ensuring the continuity of the species through the next generation of seedlings.

Lifecycle :

annual

Morphology

The morphology of Pimelea simplex is characterized by its growth form as a non-woody herb, exhibiting a relatively small stature with a plant height ranging from a minimum of 0.05 m to a maximum of 0.5 m. As a self-supporting plant, it does not function as a climber, liana, or vine, and it maintains an independent lifestyle rather than acting as a parasite. The species is primarily terrestrial in its ecological habit, lacking aquatic or semiaquatic tendencies, and it does not grow as an epiphyte. Structurally, the plant is defined by its herbaceous nature, lacking any woody tissue.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Parasite :

independent

Plant height max:

0.5 m

Plant height min:

0.05 m

Woodiness :

non-woody

Physiology

The physiology of Pimelea simplex is characterized by a C3 photosynthetic pathway, which dictates its carbon fixation processes and metabolic efficiency in varying light and temperature conditions. The morphological dimensions of its photosynthetic organs are quite specific, with leaf length typically ranging from a minimum of 0.5 cm to a maximum of 2 cm. Complementing this longitudinal growth, the leaf width is notably narrow, fluctuating between a minimum of 0.1 cm and a maximum of 0.3 cm, reflecting a slender leaf architecture that influences its transpiration rates and gas exchange capabilities.

Leaf length max:

2 cm

Leaf length min:

0.5 cm

Leaf width max:

0.3 cm

Leaf width min:

0.1 cm

Photosynthetic pathway :

C3

Reproduction

The reproduction of Pimelea simplex is characterized by specific seed properties that play a crucial role in its dispersal and establishment. The seeds produced by this species exhibit a highly consistent mass profile, showing no variance across recorded samples. Specifically, the seed mass is uniform, with a mean value of 0.00098 g. This consistency is reflected in the extreme values of the seed mass, where both the maximum and minimum recorded values are identical at 0.00098 g. Such precision in seed mass suggests a stabilized reproductive strategy within its ecological niche, ensuring that each individual seed carries a standardized amount of nutrient reserves for germination.

Seed mass mean:

0.00098 g

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Pimelea simplex has 1 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include simpleximacrin.

simpleximacrin

1. Journal of natural products