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Xyris jupicai

Rich. (1792)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Monocots Order: Poales Family: Xyridaceae Genus: Xyris

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Description

Key Characters:

Growth Form:

Stems:

Roots:

Leaves:

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Fruit:

Ploidy:

Habitat:

Elevation Range:

Historical Distribution

Images

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Uses and Culture

USES

Natural History

Statewide Status

Naturalized

Island Status

Kaua'i Naturalized

Dispersal Agents


Pollinators

Bibliography

Name Published In: Actes Soc. Hist. Nat. Paris 1: 106 (1792)

Other References

Faccenda, Arthur, et al. 2025:219 (NEWNAT/K, KEY)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Xyris jupicai Waimea District: Lysimachia Bog, Western Alakai, Napali-Kona Forest Reserve/Alakai Wilderness Preserve. True bog of the Alakai, heavily invaded by Xyris sp. Metrosideros polymorpha var. pumila, Dichanthelium, Carex montis-eeka, Rhynchospora chinensis subsp. spiciformis, Lysimachia daphnoides, Oreobolus furcatus, Cibotium, Dicranopteris Preserved_Specimen Herbaceous annual, filling up all the low-lying areas of this bog, yellow flowers not open at this time (about noon, overcast and rainy) but small yellow initials visible on inflorescences. Plants are easy to hand pull, do not seem to be attached to each other. Williams, A.M. 884 Kauai BISH 2024-06-17
2 Xyris jupicai Kanaele (Wahiawa) bog. Along W fence along fence around bog in muddy puddles and saturated soil. Preserved_Specimen Common, thousands of individuals; leaves up to 5 mm wide not twisted, margins papillate, equitant, pink at base on specimen, but field photos appear to show brown bases; scape bract surpassed by leaves; scape 1.5 mm wide at base of infl. two ribbed on opposite sides, ribs papillate; spike 1 cm long x 0.6 cm wide; scales orbicular, 5 mm in diameter, shiny brown with green patch in center; lateral sepals 4 mm long, keel irregularly toothed apically, thin; petals bright yellow c.a. 4 mm long, obtriangular, flowers in morning; fruit 3 mm obovate; seeds 0.4 mm long, fusiform transparent yellow medially with darkened ends, with quadrangular cells on surface. Hassett, K. 1 Kauai BISH 2023-10-11
3 Xyris jupicai Waimea District. Kokee Pihea trail Alakai swamp Alakai Bog West muck soils. Drocera anglica. Preserved_Specimen Hereb growing in thick mats in some areas along boardwalk of Alakai Swamp trail boardwalk. Slender leaves with long inflorescence coming up to a small bulb with 2 to 3 showy yellow flowers blooming at any one time. Jablonski, J. 37 Kauai BISH 2023-08-02
4 Xyris jupicai Lysimachia Bog located about 590m SE from the Alakai board walk trail. Bog habitat including low growing species of Metrosideros spp., Cibotium spp., Oreobolus spp., Carex, Dicanthalium spp., Viola spp., and native sedges. Preserved_Specimen Hassett, K. 4 Kauai BISH 2024-05-03
5 Xyris jupicai Waimea, Na Pali Kona FR, Alakai Swamp Trail, between Kamaikoi Stream valley and Kilohana, mile 2.0, first open bog wet forest; Metrosideros, Psychotria, Coprosma, Cheirodendron, Ilex, Elaeocarpus Preserved_Specimen perennial herb, dense clusters; leaves equitant, purple tinged; inflorescence bracts brown, petals yellow Lorence, D.H. 8437 Kauai BISH 1999-11-11
6 Xyris jupicai Waimea District: Alakai Swamp Trail, above Kawaikoi stream crossing, Napali-Kona Forest Reserve/ Alakai Wilderness Preserve True bog of the Alakai, heavily invaded by Xyris sp. Metrosideros polymorpha var. pumila, Dichanthelium, Carex montis-eeka, Rhynchospora chinensis subsp. spiciformis, Oreobolus furcatus, Cibotium, Dicranopteris Preserved_Specimen Upright annuals (plants are easily pulled up by hand, do not seem connected to each other), buds and flowers developing even from tiny plants 4-6 tall, completely dominating all the low-lying areas on either side of the boardwalk. No open flowers on the inflorescences at 9 am, though it appears unopened flowers are Williams, A.M. 883 Kauai BISH 2024-06-17
7 Xyris jupicai Alakai swamp trail, near Kilohana. Open bog Metrosideros, Cheirodendron, Dubautia paleata, Lysimachia daphnoides, Rhynchospora, spicaeformis, Drosera anglica, Carex montis-eeka, Viola kauaiensis, Oreobolus furcata, Lagenifera erici, Machaerina a Weed in open pools of water along boardwalk. Preserved_Specimen Fruit, 1ft ht. Perlman, S. 23150 Kauai BISH 2012-11-19
8 Xyris jupicai Waimea, Lysimachia Bog in the Alakai Plateau near Kilohana Vista. Bog, Lysimachia dapnoides, Drosera anglica, Cheirodendron spp., Metrosideros spp., bushbeard grass. Preserved_Specimen Clumpy herb .4 m tall. Flowers are yellow. When plucked from the ground, soil or roots smelled of dank cannibis. Soil was inundated with water on flat slope with no canopy. M. Brimhall 1 Kauai BISH 2024-03-18
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