OregonFlora species comparison

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Juncus capitatus

capitate rush, leafybract dwarf rush
Habit Plants annual, 2–13.5 cm tall, unbranched.
Leaves

capillary;

basal.
Inflorescences

1(3) terminal head-like clusters, 2–15(26) flowers per cluster;

inflorescence bracts leafy and longer than inflorescence.
Flowers

tepals 6, brown; outer longer than and more acuminate than the inner;

stamens 3;

filaments 0.6–1.3 mm;

anthers 0.2–0.6 mm;

styles 0.3–0.5(1) mm.
Capsules

shorter than the tepals, brown; reddish brown or dark brown.
Seeds

0.25–0.35 × 0.15–0.2 mm, slightly reticulate (at 10×).
2n

=18.

Juncus capitatus
Distribution
[WildflowerSearch map]
[BONAP county map]
Discussion

Moist bare ground. 50–1000 m. Est. CA; southeastern US, South America; Africa, Australia, Eurasia, New Zealand. Exotic.

This species was discovered in Oregon in 2010 on the Oregon Islands National Wildlife Refuge by Dave and Diane Bilderback. The large involucral bract is distinctive among our annuals.
Source Flora of Oregon, volume 1, page 274
Peter Zika
Sibling taxa
J. acuminatus, J. anthelatus, J. articulatus, J. balticus, J. bolanderi, J. brevicaudatus, J. breweri, J. bryoides, J. bufonius, J. bulbosus, J. canadensis, J. capillaris, J. compressus, J. confusus, J. conglomeratus, J. covillei, J. diffusissimus, J. drummondii, J. dudleyi, J. effusus, J. ensifolius, J. ensifolius x Juncus nevadensis, J. exiguus, J. falcatus, J. filiformis, J. gerardi, J. hemiendytus, J. hesperius, J. howellii, J. inflexus, J. interior, J. kelloggii, J. laccatus, J. lescurii, J. longistylis, J. marginatus, J. mertensianus, J. mexicanus, J. nevadensis, J. occidentalis, J. orthophyllus, J. oxymeris, J. parryi, J. patens, J. pelocarpus, J. planifolius, J. ranarius, J. regelii, J. saximontanus, J. supiniformis, J. tenuis, J. tiehmii, J. torreyi, J. triglumis, J. trilocularis, J. uncialis
Web links 
Unless otherwise noted, all data comes from OregonFlora.



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