Thelypodium integrifolium

{{Short description|Species of flowering plant}}

{{Speciesbox

|image = Thelypodium integrifolium ssp affine 6.jpg

|image_caption = Thelypodium integrifolium subsp. affine

|status = {{TNCStatus}}

|status_system = TNC

|status_ref = {{cite web |last1=NatureServe |title=Thelypodium integrifolium |url=https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.147989/Thelypodium_integrifolium |access-date=22 December 2023 |location=Arlington, Virginia |date=2023}}

|genus = Thelypodium

|species = integrifolium

|authority = (Nutt.) Endl. ex Walp.

}}

Thelypodium integrifolium is a species of flowering plant in the mustard family known by the common names entireleaved thelypody{{PLANTS|id=THIN|taxon=Thelypodium integrifolium|accessdate=9 December 2015}} and foxtail thelypodium. It is native to much of the western United States, including the Great Basin and surrounding plateaus and deserts.[http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?2240,2668,2673 Jepson: T. integrifolium]

It occurs in several types of habitat, often growing in sandy, mineral-rich, and alkaline soils, such as those on playas.

Description

Thelypodium integrifolium is a biennial herb producing a hairless, waxy stem with a thick, sturdy base, unbranched or branching toward the top and sometimes becoming quite tall, approaching three meters in maximum height. The thick, waxy leaves are not compound or lobed, having smooth edges. The largest basal leaves may exceed 30 centimeters in length. Leaves higher on the plant are shorter and are smooth-edged or toothed.

The inflorescence is a dense, cylindrical, spikelike raceme of white or purplish flowers. The fruit is a silique which may be 8 centimeters long.

=Subspecies=

There are five subspecies:

  • T. i. ssp. affine - white petals - Mojave Desert (California), Great Basin.[http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?2240,2668,2673,2674 Jepson: T. i. ssp. affine]
  • T. i. ssp. complanatum - mainly limited to the Great Basin; generally with lavender petals.[http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?2240,2668,2673,2675 Jepson: T. i. ssp. complanatum]
  • T. i. ssp. gracilipes - native to the Four Corners region
  • T. i. ssp. integrifolium - widespread in the northern distribution of the species
  • T. i. ssp. longicarpum - endemic to Arizona, where it is known only from the Grand Canyon and vicinity

References

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