SPECIES DESCRIPTION
PHACELIA  TANACETIFOLIA

Family:- HYDROPHYLLACEAE

Common Names:- Lacy phacelia, blue tansy or purple tansy.

Synonyms:- Phacelia tanacetifolia var. cinerea, Phacelia tanacetifolia var.
pseudo-distans.

Meaning:- Phacelia (Gr) Bundle, (the clustered flowers).
                 Tanacetifolia (L) With leaves those of Tanacetum.      
                
General description:- Annual.

Stems:-
1) 20-80 cm, glandular-pubescent and hispid, usually erect and simple or sparingly
    branched.

Leaves:-
1) 2-10 cm, shortly petiolate, ovate to ovate-oblong in outline, 1- to 2-pinnatisect.

Flowers:-
1) Inflorescence, dense, generally 2-4-branched.
2) Calyx lobes, 4-7 mm, 6-8 mm in fruit, linear, densely long-hairy.
3) Corolla persistent in fruit, 6-9 mm, widely campanulate, blue.
4) Corolla scales, fused to the filament bases, linear.
5) Stamens 9-15 mm, long-exserted, glabrous.
6) Filaments purple.
7) Style 8-15 mm, connate for c. 1 mm, cleft 2/3-3/4, glabrous.

Fruit:-
1) Capsule, 3-4 mm, ovoid, glabrous proximally, puberulent to short-hairy distally.
2) Seeds, 1-2(4), 2--3 mm, wrinkled, pitted.

Click here for a glossary of terms used.

Habitat:- Sandy to gravelly slopes, open areas. Elevation: 0-2500 m.

Distribution:- Native to North America. But is now widely cultivated in agriculture
as a cover crop and occasionally as an ornamental on road embankments.
Previously unrecorded from Crete. Discovered by Christopher Cheiladakis on the
Lasithi Plateau in 2022, with a further two locations found by Enda McMullen in
2023 in the Spili area.

Used outside its native range in agriculture as a cover crop, a bee plant, an
attractant for other beneficial insects, as a green manure and an ornamental plant.
It is planted in vineyards and alongside crop fields, where it is valued for its long,
coiling inflorescences of nectar-rich flowers which open in sequence, giving a long
flowering period. It is a good insectary plant, attracting pollinators such as
bumblebees and honey bees.

Flowering time:- Mar--May

Photos by:- Christopher Cheiladakis and Enda McMullen