Triodanis holzingeri – Holzinger's Venus' Looking-glass

Triodanis holzingeri - Holzinger's Venus' Looking-glass, Western Venus Lookinglass (flowers)

Triodanis holzingeri - Holzinger's Venus' Looking-glass, Western Venus Lookinglass (flowers and seed capsules from the same plant)

Plant Name

Scientific Name: Triodanis holzingeri

Synonym: Specularia holzingeri

Common Names: Holzinger's Venus' Looking-glass, Western Venus Lookinglass

Plant Characteristics

Duration: Annual

Growth Habit: Herb/Forb

Arizona Native Status: Native

Habitat: Riparian, Upland, Mountain (lower elevation). This wildflower grows in canyons and on rocky hillsides in the uplands and mountains and in moist riparian areas from the deserts to the mountains. A good place to find it is along the stream in Sabino Canyon near Tucson.

Flower Color: Violet

Flowering Season: Spring, Summer

Height: To 16 inches (41 cm) tall

Description: The flowers emerge from the leaf axils and are cupped by stem leaves. The individual flowers are sessile and have 5 ovate lobes. The flowers are followed by elongated, green drying to tan seed capsules that dehisce (open) at narrowly linear pores to eject the seeds. The leaves clasp the stems and are green, alternate, serrate, sessile, and rounded in shape.

This plant has linear dry seed capsule pores, while the similar Clasping Venus' Looking-glass (Triodanis perfoliata) has broadly elliptical to rounded dry seed capsule pores.


Kingdom: Plantae – Plants
Subkingdom: Tracheobionta – Vascular plants
Superdivision: Spermatophyta – Seed plants
Division: Magnoliophyta – Flowering plants
Class: Magnoliopsida – Dicotyledons
Subclass: Asteridae
Order: Campanulales
Family: Campanulaceae – Bellflower family
Genus: Triodanis Raf. ex Greene – Venus' looking-glass
Species: Triodanis holzingeri McVaugh – Holzinger's Venus' looking-glass

More About This Plant

Arizona County Distribution Map