Jepson eFlora: Taxon page
Vascular Plants of California
Key to families | Table of families and genera
Previous taxon Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M |
| N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Next taxon


Thelypodium howellii subsp. howellii
HOWELL'S THELYPODIUM


Higher Taxonomy
Family: Brassicaceae (Cruciferae)View DescriptionDichotomous Key
Common Name: MUSTARD FAMILY
Habit: Annual to shrub; sap pungent, watery. Leaf: generally simple, alternate; generally both basal, cauline; stipules 0. Inflorescence: generally raceme, generally not bracted. Flower: bisexual, generally radial; sepals 4, generally free; petals (0)4, forming a cross, generally white or yellow to purple; stamens generally 6 (2 or 4), 4 long, 2 short (3 pairs of unequal length); ovary 1, superior, generally 2-chambered with septum connecting 2 parietal placentas; style 1, stigma entire or 2-lobed. Fruit: capsule, generally 2-valved, "silique" (length >= 3 × width) or "silicle" (length < 3 × width), dehiscent by 2 valves or indehiscent, cylindric or flat parallel or perpendicular to septum, segmented or not. Seed: 1--many, in 1 or 2 rows per chamber, winged or wingless; embryo strongly curved.
Genera In Family: +- 330 genera, 3780 species: worldwide, especially temperate. Note: Highest diversity in Mediterranean area, mountains of southwestern Asia, adjacent central Asia, western North America; some Brassica species are oil or vegetable crops; Arabidopsis thaliana used in experimental molecular biology; many species are ornamentals, weeds. Aurinia saxatilis (L.) Desvaux in cultivation only. Aubrieta occasional waif in central NCoR, Carrichtera annua (L.) DC. in SCo, Iberis sempervirens L., Iberis umbellata L. in PR, Teesdalia coronopifolia (Bergeret) Thell., Teesdalia nudicaulis (L.) W.T. Aiton in southern NCoRO, CCo. Cardaria, Coronopus moved to Lepidium; Caulostramina to Hesperidanthus; Guillenia to Caulanthus; Heterodraba to Athysanus; California taxa of Lesquerella to Physaria; Malcolmia africana to Strigosella.
eFlora Treatment Author: Ihsan A. Al-Shehbaz, except as noted
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Genus: ThelypodiumView DescriptionDichotomous Key


Habit: Annual to perennial herb; hairs 0 or simple. Leaf: basal rosetted, petioled, entire to pinnately lobed; mid-cauline petioled or sessile, base lobed to sagittate or wedge-shaped. Flower: sepals erect to reflexed, bases sac-like or not; petals linear to oblanceolate, spoon-shaped, or obovate, clawed or not, white to lavender or purple; stamens free (+- fused). Fruit: silique, dehiscent, linear, unsegmented, +- narrowed between seeds, cylindric or +- flat parallel to septum, stalked above receptacle; stigma entire. Seed: 1 row per chamber, +- flat; wing generally 0.
Etymology: (Greek: female foot, from fruit stalk above receptacle)
eFlora Treatment Author: Ihsan A. Al-Shehbaz
Reference: Al-Shehbaz 1973 Contr Gray Herb 204:1--148
Thelypodium howellii S. Watson subsp. howellii
NATIVE
Habit: Biennial, glaucous; hairs 0 except on petiole. Stem: 1--9 dm, simple or branched distally. Leaf: basal blade 2--10(13.5) cm, lyre-shaped (dentate or entire), withered by fruit time, petiole ciliate; mid-cauline sessile, sagittate to clasping, entire. Inflorescence: open, much expanded in fruit. Flower: petals 5--8(12) mm, 0.5--1.2(3) mm wide, narrowly oblanceolate, lavender to purple, not crinkled; paired filaments partly to completely fused. Fruit: 1.5--4.5(7) cm, cylindric, narrowed between seeds; stalk above receptacle 0.5--1(3.5) mm; style (0.5)1--2.7(4) mm; pedicel ascending, 3--8(14.5) mm, stout, straight or +- curved. Seed: 22--40, 1--1.7(2) mm, plump. Chromosomes: 2n=26.
Ecology: Alkaline meadows, flats, sagebrush scrub; Elevation: 1000--1600 m. Bioregional Distribution: MP; Distribution Outside California: to Washington. Flowering Time: May--Jul Note: Other subsp. in eastern Oregon only.
Jepson eFlora Author: Ihsan A. Al-Shehbaz
Reference: Al-Shehbaz 1973 Contr Gray Herb 204:1--148
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
Listed on CNPS Rare Plant Inventory

Previous taxon: Thelypodium flexuosum
Next taxon: Thelypodium integrifolium

Name Search

Please use this Google Form for Contact/Feedback

Citation for this treatment: Ihsan A. Al-Shehbaz 2012, Thelypodium howellii subsp. howellii, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=53180, accessed on April 16, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on April 16, 2024.

No expert verified images found for Thelypodium howellii subsp. howellii.



Geographic subdivisions for Thelypodium howellii subsp. howellii:
MP
MAP CONTROLS
1. You can change the display of the base map layer control box in the upper right-hand corner.
2. County and Jepson Region polygons can be turned off and on using the check boxes.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).





 

Data provided by the participants of the  Consortium of California Herbaria.
MAP LEGEND
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
READ ABOUT YELLOW FLAGS


CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).