Flora of North America species comparison

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Juncus gymnocarpus

Pennsylvania rush
Habit Herbs, perennial, 5–10 dm.
Rhizomes

widely creeping, 2–4 mm diam.
Culms

terete, 1.5–2.5 mm diam.
Cataphylls

several.
Leaves

blade absent.
Inflorescences

8–30(–50)-flowered, open, 1.5–4 cm;

primary bract terete, 1–2.5 dm, much longer than inflorescence.
Flowers

pedicellate;

bracteoles broadly ovate;

tepals light brown, ovate-lanceolate, 1.8–2.5 mm, apex acuminate;

inner series shorter, margins scarious, apex acute;

stamens 6, filaments 1–1.3 mm, anthers 0.5–0.7 mm;

style 0.5 mm.
Capsules

reddish tan to brown, lustrous, 3-locular, widely ellipsoid, 2–3 × 1.8–2.2 mm, exceeding perianth.
Seeds

dark amber, obovoid, 0.7–1 mm, not tailed.

Juncus gymnocarpus
Phenology Flowering and fruiting summer.
Habitat Sphagnous swamps, low woods, edges of lakes
Elevation 600–1500 m (2000–4900 ft)
Distribution
from FNA
AL; FL; MS; NC; PA; SC; TN
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 22.
Parent taxa Juncaceae > Juncus > subg. Genuini
Sibling taxa
J. acuminatus, J. acutiflorus, J. acutus, J. alpinoarticulatus, J. anthelatus, J. arcticus, J. articulatus, J. biglumis, J. bolanderi, J. brachycarpus, J. brachycephalus, J. brachyphyllus, J. brevicaudatus, J. bryoides, J. bufonius, J. bulbosus, J. caesariensis, J. canadensis, J. capillaris, J. capitatus, J. castaneus, J. chlorocephalus, J. compressus, J. confusus, J. cooperi, J. coriaceus, J. covillei, J. debilis, J. dichotomus, J. diffusissimus, J. drummondii, J. dubius, J. dudleyi, J. effusus, J. elliottii, J. ensifolius, J. falcatus, J. filiformis, J. filipendulus, J. georgianus, J. gerardii, J. greenei, J. hallii, J. hemiendytus, J. howellii, J. inflexus, J. interior, J. kelloggii, J. leiospermus, J. lesueurii, J. longistylis, J. luciensis, J. macrandrus, J. macrophyllus, J. marginatus, J. maritimus, J. megacephalus, J. mertensianus, J. militaris, J. nevadensis, J. nodatus, J. nodosus, J. occidentalis, J. orthophyllus, J. oxymeris, J. parryi, J. patens, J. pelocarpus, J. pervetus, J. phaeocephalus, J. polycephalus, J. regelii, J. repens, J. roemerianus, J. scirpoides, J. secundus, J. squarrosus, J. stygius, J. subcaudatus, J. subtilis, J. supiniformis, J. tenuis, J. texanus, J. textilis, J. tiehmii, J. torreyi, J. trifidus, J. triformis, J. triglumis, J. trigonocarpus, J. uncialis, J. validus, J. vaseyi, J. xiphioides
Synonyms J. smithii
Name authority Coville: Memoirs of the Torrey Botanical Club 5: 106. (1894)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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