Acmispon dendroideus var. traskiae

San Clemente Island Lotus

FWS Focus

Overview

Characteristics
Overview

The San Clemente Island lotus is a subshrub in the legume or pea family (Fabaceae). It was initially listed as endangered in 1977 as threats to the species included non-native herbivores, land use, erosion, non-native plants, fire and fire management and climate change climate change
Climate change includes both global warming driven by human-induced emissions of greenhouse gases and the resulting large-scale shifts in weather patterns. Though there have been previous periods of climatic change, since the mid-20th century humans have had an unprecedented impact on Earth's climate system and caused change on a global scale.

Learn more about climate change
. Due to the removal of non-native herbivores and the Navy’s development of an Integrated Natural Resources Management Plan to implement erosion and fire control measures, the species recovered to the point where it was delisted in 2023.

Scientific Name

Acmispon dendroideus var. traskiae
Common Name
Trask's island broom
Kingdom

Location in Taxonomic Tree

Identification Numbers

TSN:

Characteristics

Characteristic category

Life Cycle

Characteristics
Reproduction

It is self-compatible.

Life Cycle

It flowers between February and August, peaking from March to May, with halictid bees, bumblebees and small beetles observed foraging on the flowers.

Characteristic category

Physical Characteristics

Characteristics
Size & Shape

It is typically less than four feet tall with slender green branches. Each leaf has three to five leaflets, with fine or no hair.

Color & Pattern

It has small yellow flowers arranged in one to five flowered clusters. As they age, the flowers change from yellow to orange to red.

Characteristic category

Habitat

Characteristics
Habitat

It grows around rock outcrops and among large boulders situated in grassland areas and along the interface between grassland and maritime sage scrub. It occurs on well-drained soils where adequate soil moisture is available and mostly on clay to rocky soils.

Geography

Characteristics
Range

It is endemic to San Clemente Island, Los Angeles County, California. It establishes on north- and east-facing slopes and ridges at elevations ranging from 25 to 1,400 feet, as well as in canyon bottoms or along ridgelines.