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Hypericum parvulum

Greene (1888)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-Rosids Order: Malpighiales Family: Hypericaceae Genus: Hypericum

St. John's wort

Description

Key Characters:

Growth Form: Annual or perennial herbs.

Stems: Stems decumbent to sometimes weakly ascending, 0.1–0.4 dm long, branched or unbranched.

Roots:

Leaves: Leaves simple. Opposite. Blades ovate to oblong or elliptic to suborbicular, sometimes oblong–lanceolate or oblanceolate to spatulate, 2–8(–11) mm long, 1.5–3(–5) mm wide. Base cordate, or cuneate. Surfaces evenly glandular punctate with pale glands. Margins entire. Sessile, surrounding th stem. Stipules absent.

Flowers: Flowers 1 to few in terminal cymes, pedicels (1.4–)2–14 mm long in fruit. Flowers bisexual (perfect). Sepals narrowly elliptic to oblong or oblanceolate, 2–5 mm long. Petals pale yellow, elliptic or oblong to obovate, 1.7–5 mm long. Stamens 5–10, distinct. Ovary superior; styles 3.

Fruit: Capsules broadly ellipsoid; 2.5–5 mm long. Seeds yellowish brown to tan; cylindrical; ca. 0.5 mm long; inconspicuously longitudinally ribbed.

Ploidy:

Habitat: Disturbed areas.

Elevation Range:

Historical Distribution

Uses and Culture

USES

  • Yes

Natural History

Statewide Status

Naturalized

Island Status

Hawai'i Naturalized

Dispersal Agents


Pollinators

Bibliography

Name Published In: Pittonia 1: 154 (1888)

Other References

Wagner et al. 1990:544 (H)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Recorded By Record Number Island Source Date
1 Hypericum parvulum 1 1/2 air miles S of Volcano House in tree fern forest; i nfrequent terretria forming small patches in rain forest PRESERVED_SPECIMEN Henrickson, J.S. 4091b Hawaii BISH 8/6/1969
2 Hypericum parvulum Mauna Loa, above Kulani, road at edge of rain forest PRESERVED_SPECIMEN Christ, J.H. 3 Hawaii BISH 4/24/1957
3 Hypericum parvulum Kilauea, common in pasture under trees PRESERVED_SPECIMEN Hosaka, E.Y. 2519 Hawaii BISH 6/11/1940
4 Hypericum parvulum hawaii volcanoes national park, napau trail just below makaopuhi crater abundant PRESERVED_SPECIMEN f. r. fosberg 50516 MU 11/8/1968
5 Hypericum parvulum piihonua, hilo forest reserve Primary vegetation: Metrosideros polymorpha, Ilex anomala. Stunted ohia wetland dieback. Soils are a shallow organic, poorly drained type found on a pahoehoe flow. One small area of water was at or near the surface. PRESERVED_SPECIMEN adee, k.t. collector number: s.n. Hawaii BISH 6/5/1979
6 Hypericum parvulum Hawaii National Park, Napau Trail PRESERVED_SPECIMEN Fagerlund, G.O. 14 Hawaii BISH 8/26/1942
7 Hypericum parvulum Kau District. Kilauea Forest Reserve. Close to IBP Study site In open area PRESERVED_SPECIMEN Herat, T. 969 Hawaii BISH 7/8/1974
8 Hypericum parvulum hawaii national park, napau trail PRESERVED_SPECIMEN fagerlund, g.o. mitchell, a.l. collector number: 14 Hawaii BISH 8/26/1942
9 Hypericum parvulum Hawaii Volcanoes National Park, Napau Trail just below Makaopuhi Crater PRESERVED_SPECIMEN Fosberg, F. R. 50516 Hawaii US 11/8/1968
10 Hypericum parvulum Hawaii Is., kilauea, northeast ledge PRESERVED_SPECIMEN Vladimir J. Krajina 611225009 UBC 12/25/1961
11 Hypericum parvulum Puna Dist, Volcano Refuse Transfer Station, along Hwy 11 between Glenwood & Volcano PRESERVED_SPECIMEN Lorence, D. H.; Flynn, T. W. 6674 Hawaii US 1/7/1991
12 Hypericum parvulum Volcano Refuse Transfer Station, along Hwy 11 between Glenwood and Volcano. Clearing and secondary vegetation in Metrosideros wet forest zone. PRESERVED_SPECIMEN David H. Lorence 6674 Hawaii PTBG 1/7/1991
13 Hypericum parvulum Volcano Village, Wright Road, 2.4 miles from Hwy 11. Along road side in Olaa Rain Forest, Hawaii Volcanoes National Park. Cibotium glaucum dominated forest. PRESERVED_SPECIMEN Tim Flynn 3919 Hawaii PTBG 5/26/1990
14 Hypericum parvulum puna dist, volcano refuse transfer station, along hwy 11 between glenwood & volcano PRESERVED_SPECIMEN d. h. lorence & t. w. flynn 6674 Hawaii US 1/7/1991
15 Hypericum parvulum Near Thurston Lave Tube, Kilauea area. PRESERVED_SPECIMEN Rubtzoff, P. 3719 Hawaii US 6/25/1958
16 Hypericum parvulum Piihonua, Hilo Forest Reserve Primary vegetation: Metrosideros polymorpha, Ilex anomala. Stunted ohia wetland dieback. Soils are a shallow organic, poorly drained type found on a pahoehoe flow. One small area of water was at or near the surface. PRESERVED_SPECIMEN Adee, K.T. s.n. Hawaii BISH 6/5/1979
17 Hypericum parvulum near thurston lave tube, kilauea area. PRESERVED_SPECIMEN p. rubtzoff 3719 Oahu US 6/25/1958
18 Hypericum parvulum Mauka of Kulani Prison, naturalized in clearing PRESERVED_SPECIMEN Degener, O. 21827 Hawaii BISH 2/15/1952
19 Hypericum parvulum drive down kona-hilo hghwy about 6.8 miles toward hilo from hongo store. walk up unpaved road about 100 meters. plant was about 20 meters ne(right side) of road PRESERVED_SPECIMEN newell, c.l. collector number: 984 Hawaii BISH 6/26/1967
20 Hypericum parvulum mauna loa, above kulani, road at edge of rain forest PRESERVED_SPECIMEN christ, j.h. collector number: 3 Hawaii BISH 4/24/1957
21 Hypericum parvulum Puna district. Volcano Refuse Transfer Station, along Highway 11 betw. Glenwood and Volcano; clearing and secondary vegetation in Metrosideros wet forest zone, PRESERVED_SPECIMEN Lorence, D.H. 6674 Hawaii BISH 1/7/1991
22 Hypericum parvulum puna district. volcano refuse transfer station, along highway 11 betw. glenwood and volcano; clearing and secondary vegetation in Metrosideros wet forest zone, PRESERVED_SPECIMEN lorence, d.h. flynn, t. collector number: 6674 Hawaii BISH 1/7/1991
23 Hypericum parvulum 1 1/2 air miles s of volcano house in tree fern forest; i nfrequent terretria forming small patches in rain forest PRESERVED_SPECIMEN henrickson, j.s. rodriguez jimenez, c. collector number: 4091b Hawaii BISH 8/6/1969
24 Hypericum parvulum Drive down Kona-Hilo Hghwy about 6.8 miles toward Hilo from Hongo Store. Walk up unpaved road about 100 meters. Plant was about 20 meters NE(right side) of road PRESERVED_SPECIMEN Newell, C.L. 984 Hawaii BISH 6/26/1967
25 Hypericum parvulum hawaii volcanoes national park. located down kona-hilo hghway about 0.8 miles from park entrance toward kona, just past sulfur banks on small, relatively level ridge at left(SW) of highway before a white bridge. PRESERVED_SPECIMEN newell, c.l. collector number: 608 Hawaii BISH 8/27/1966
26 Hypericum parvulum mauka of kulani prison, naturalized in clearing PRESERVED_SPECIMEN degener, o. greenwell, a. collector number: 21827 Hawaii BISH 2/15/1952
27 Hypericum parvulum vicinity of volcano, kilauea area Weeds along roadsides. Slightly disturbed tree fern rain forest. Bulldozed (1967) PRESERVED_SPECIMEN iltis, h.h. iltis, c.m.; iltis, m. collector number: h-81 Hawaii BISH 6/19/1967
28 Hypericum parvulum Kilauea Crater, PRESERVED_SPECIMEN Meebold, A. s.n. Hawaii BISH 5/1/1932
29 Hypericum parvulum Vicinity of Volcano, Kilauea area Weeds along roadsides. Slightly disturbed tree fern rain forest. Bulldozed (1967) PRESERVED_SPECIMEN Iltis, H.H. H-81 Hawaii BISH 6/19/1967
30 Hypericum parvulum Puna, Hawaii Miquisous, exotic weed in muddy rain-forest PRESERVED_SPECIMEN Degener, O. 31762 Hawaii BISH 7/4/1967
31 Hypericum parvulum laumaia Near shore on rocks in area of fresh water mixing, about 300 m south of harbor. Forming clumps and patches to 20 cm across and 5 cm high. -- Tetrasporic PRESERVED_SPECIMEN neal, m.c. hartt, c. collector number: 809 Maui BISH 8/17/1935
32 Hypericum parvulum kau district. kilauea forest reserve. close to ibp study site In open area PRESERVED_SPECIMEN herat, t. herat, r.; higashino, p.k. collector number: 969 Hawaii BISH 7/8/1974
33 Hypericum parvulum kilauea crater, PRESERVED_SPECIMEN meebold, a. collector number: s.n. Hawaii BISH 5/1/1932
34 Hypericum parvulum kilauea, common in pasture under trees PRESERVED_SPECIMEN hosaka, e.y. collector number: 2519 Hawaii BISH 6/11/1940
35 Hypericum parvulum Laumaia In koa-lehua forest. PRESERVED_SPECIMEN Neal, M.C. 809 Hawaii BISH 8/17/1935
36 Hypericum parvulum Hawaii Volcanoes National Park. Located down Kona-Hilo Hghway about 0.8 miles from Park Entrance toward Kona, just past Sulfur Banks on small, relatively level ridge at left(SW) of highway before a white bridge. PRESERVED_SPECIMEN Newell, C.L. 608 Hawaii BISH 8/27/1966
37 Hypericum parvulum puna, hawaii Miquisous, exotic weed in muddy rain-forest PRESERVED_SPECIMEN degener, o. degener, i. collector number: 31762 Hawaii BISH 7/4/1967
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