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Hypericum gentianoides

Hypericum gentianoides (L.) Britton Sterns & Poggenb.

Sarothra gentianoides L.

Pineweed, Orange Grass

KingdomPlantaePlants, but not fungi, lichens, or algae (from Stearn’s Botanical Latin)
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassMagnoliopsidaDicotyledons—plants with two initial seed leaves
SubclassRosidaeRoses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more
OrderMalpighialesA broad group encompassing 16,000 species
FamilyHypericaceaeSt. John’s Wort family
GenusHypericumFrom ancient Greek hyper, “above,” and eikon, “picture,” from an old practice of putting flowers above a picture to ward off evil spirits
Speciesgentianoides“Like a gentian”

About plant names...

Pineweed (also called orange grass) is a native of North America.

Identification: I first noticed pineweed because of its tiny red fruits, growing on thin plants that seem to consist of stems without leaves. I wondered if this was even a “regular” flowering plant—it looked like a ground pine or something similar. Its stems are wiry and green. It reaches 3-18" (7.6-45 cm) in height, usually about 6" (15 cm). Leaves are tiny and narrow, about ¼" (6.3 mm) long. Tiny yellow flowers up to ¼" (6.3 mm) across appear in the spring. The fruits in the fall tip the multiply branched stems with pointed, dark red tips.

Online References:

Hypericum gentianoides on Missouriplants.com

Hypericum gentianoides on the Connecticut Botanical Society's Connecticut wildflowers site

Hypericum gentianoides on Missouriplants.com

Hypericum gentianoides at the Michigan Natural Features Inventory (PDF)

Hypericum gentianoides on Southeastern Flora, the Southeastern U.S. Plant Identification Resource

Hypericum gentianoides at the Lady Bird Johnson Wildflower Center

Hypericum gentianoides at the University of Wisconsin's Robert W. Freckmann Herbarium

References:

Newcomb, Lawrence, Morrison, Gordon (Illus.), Newcomb’s Wildflower Guide, Little, Brown and Company, 1977, p. 172

Hypericum gentianoides (Pineweed, Orange Grass)

7/16/2013 · Townsend Wildlife Management Area, Townsend, MA
≈ 6 × 9" (16 × 23 cm)

Hypericum gentianoides (Pineweed, Orange Grass)

7/21/2010 · Nashua River Rail Trail, Ayer, MA
≈ 7 × 4½" (17 × 11 cm)

Hypericum gentianoides (Pineweed, Orange Grass)

9/25/2009 · Nashua River Rail Trail, near Hospital, Ayer, MA
≈ 6 × 9" (14 × 22 cm)

Hypericum gentianoides description by Thomas H. Kent, last updated 16 Aug 2013.

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Hypericum gentianoides (Pineweed, Orange Grass)

7/21/2010 · Nashua River Rail Trail, Ayer, MA
≈ 6 × 4½" (16 × 11 cm)

Hypericum gentianoides (Pineweed, Orange Grass)

9/25/2009 · Nashua River Rail Trail, near Hospital, Ayer, MA
≈ 6 × 9" (15 × 23 cm)

Hypericum gentianoides (Pineweed, Orange Grass)

7/21/2010 · Nashua River Rail Trail, Ayer, MA
≈ 6 × 4½" (15 × 11 cm)

Hypericum gentianoides (Pineweed, Orange Grass)

9/25/2009 · Nashua River Rail Trail, near Hospital, Ayer, MA
≈ 4½ × 7" (11 × 17 cm)

Hypericum gentianoides (Pineweed, Orange Grass)

8/7/2010 · Nashua River Rail Trail, near Nashoba Hospital, Ayer, MA
≈ 7 × 4½" (17 × 11 cm)

Hypericum gentianoides (Pineweed, Orange Grass)

8/22/2009 · Tom and Susan’s, Pepperell, MA
≈ 12 × 8" (31 × 20 cm) ID is uncertain

Range:

About this map...