Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

CARYOPHYLLACEAE

PINK FAMILY

Ronald L. Hartman (except Silene)

Annual, biennial, perennial herb, rarely dioecious, taprooted or rhizome generally slender
Leaves simple, generally opposite; stipules generally 0; petiole generally 0; blade entire, sheath generally 0
Inflorescence: cyme, generally open; flowers few–many or flower solitary and axillary; involucre generally 0
Flower generally bisexual, radial; hypanthium sometimes present; sepals generally 5, ± free or fused into a tube, tube generally herbaceous between lobes or teeth; awns generally 0; petals generally 5 or 0, generally tapered to base (or with claw long, blade expanded), entire to 2–several-lobed, blade generally without scale-like appendages (inner surface), generally without ear-like lobes at base; stamens generally 10, generally fertile, generally free, generally from ovary base; nectaries generally 0; ovary superior, generally 1-chambered, placentas basal or free-central, styles 2–5 or 1 and 2–3-branched
Fruit: capsule or utricle (rarely modified, dehiscent), generally sessile
Seeds: appendage generally 0
Genera in family: 85 genera, 2400 species: widespread, especially arctic, alpine, temp, n hemisphere; some cultivated (Agrostemma, Arenaria, Cerastium, Dianthus, Gypsophila, Lychnis, Saponaria, Silene, Vaccaria ).

ACHYRONYCHIA


Species in genus: 1 sp
Etymology: (Greek: chaff fingernail, from silvery, chaffy sepals)

Native

A. cooperi Torr. & A. Gray

ONYX FLOWER, FROST-MAT

Annual, prostrate to ascending, glabrous to ± hairy, taprooted
Stems many, 3–17 cm
Leaf: stipules 0.1–0.4 mm, ± ovate, scarious, ± fringed, white; blade 3–20 mm, oblanceolate; vein 1
Inflorescence: cyme, axillary; flowers 20–60+; pedicels 0.5–2.5 mm
Flower 2.5–3 mm; hypanthium in fruit ± cylindric; calyx abruptly expanded above; sepals 5, free, ± 1.2–1.5 mm, ovate to reniform, green, fleshy, margin wide, scarious, ± jagged, white, deciduous; petals 0; fertile stamens 1–2, sterile stamens 14–19, ± 0.5 mm, thread-like, arising from hypanthium rim; ovary superior, style 2-branched in upper 1/2, 0.3–0.4 mm
Fruit: utricle, ovoid; teeth 8–10, minute
Seed 1, ± 1 mm, ovoid, ± compressed, tan, red dot near narrow end
Ecology: Sandy slopes, flats, washes
Elevation: 50–700 m.
Bioregional distribution: Desert
Distribution outside California: Arizona, Mexico
Flowering time: Jan–May
Closely related to and possibly same as Scopulophila.

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bioregional map for ACHYRONYCHIA%20cooperi being generated
 


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