Description:

Dubautia herbstobatae is a small, spreading shrub reaching heights up to 50 centimeters. The stems are brown, woody near the growing points, and primarily glabrous except for ciliolate features at leaf scars. The leaves are arranged oppositely or occasionally in threes (ternate), with a lustrous or shiny upper surface. They are narrowly elliptic, ranging from 2 to 5.5 cm in length and 0.3 to 1.1 cm in width, typically 1-nerved or sometimes obscurely 3-nerved. The leaves are glabrous or near glabrous, with entire margins or very shallowly 1-3-toothed above the middle. These leaves are eciliate, with a narrowly acute apex and a sessile or briefly attenuate base. It features 5-15 heads, often arranged ternately or paired along a terminal central axis or in simple, lax, paniculate inflorescences measuring 3-9 cm in length and 2.5-7.5 cm in width. Peduncles are slender, hispidulous-tomentose, with the lower ultimate ones usually ranging from 1-4 cm long and the upper ones reduced to about 0.2 cm. The receptacle is flat to low and broadly conical. The false involucre consists of 4-11 peripheral, strongly connate receptacular bracts measuring 5-9 mm long, grayish silky pubescent. Florets number 4-20 per head, featuring yellowish-orange corollas 3-5 mm long, generally glabrous and eglandular or with a few inconspicuous hairs on the tubular portion. The pappus consists of usually 16-20 very narrowly linear, ascending-setose bristles approximately 4-5.5 mm long. The achenes are 4-6 mm long, grayish silky pubescent. It is typically found on rock outcrops on north-facing ridges in dry to mesic shrublands between 580 – 910 meters.

Dubautia herbstobatae

Family: Asteraceae

Hawaiian Name: kūpaoa, na‘ena‘e

 Minimum Length: 10.02 (mm)

 Maximum Length: 10.96 (mm)

 Minimum Width: 0.83 (mm)

 Maximum Width: 1.18 (mm)

 Minimum Mass: 0.88 (mg)

 Maximum Mass: 1.09 (mg)

 Texture: TBD

Geographic Distribution:

 Oahu

PEPP Status:

Not Applicable

Native Status:

Endemic

2D Seed Shapes

Bean-shaped (Reniform): Resembling the shape of a kidney or bean.

Square or Oblong: Angular shape with all sides more or less equal or longer than wide.

Triangular: Three-sided shape, broadest below the middle.

Elliptic: Rounded at both ends. shaped like an ellipse or oval.

Ovate or Obovate: egg-shaped, broader at one end.

Linear: Extremely long and narrow, with sides usually parallel.

Round: Appears circular, with length and width roughly the same.

Cardioid (Heart-Shaped): One edge has a prominent double curve into two lobes.

3D Seed Shapes

Cylindrical: A cylinder with parallel sides and a circular cross-section.

Discoid: Resembling a disc or plate with two relatively flat surfaces.

Fusiform: Spindle-shaped, tapering at both ends.

Globose: Spherical.

Lenticular: Resembling a lens with two convex surfaces.

Ovoid: Egg-shaped.

Plano-convex: Having a flat ventral (planar) surface and a curved dorsal (convex) surface.

Polygonal: Having more than three flat faces meeting at angles.

Sectoroid: Resembling a segment of an orange with two relatively flat faces and one curved face.

Subglobose/ellipsoid: Inflated shape but less than spherical.

Trigonous: Having three faces that meet at a distinct angle; triangular in cross-section.

Federal Status

Endangered species (E) are species that are so rare they’re in danger of becoming extinct.

Threatened species (T) are species that are likely to become endangered within the foreseeable future throughout all or a significant portion of their range.

Species of Concern (SOC) are species about which there are some concerns regarding status and threats, but insufficient information is available to list the species under the Endangered Species Act (ESA).

Plant Extinction Prevention (PEP) is a state status for rare plants that focuses its efforts on species that have fewer than 50 remaining wild individuals.

Storage Behavior

Orthodox seeds (desiccation-tolerant): can be dried to an internal seed moisture of less than 12% water and stored at freezing temperatures.

Intermediate seeds (temperature-sensitive) tend to age faster than orthodox seeds and may have only a 5-year lifespan when stored at -20°C. They are recommended for storage at 5°C.

Recalcitrant seeds (desiccation-sensitive): cannot be stored in a conventional freezer as they cannot survive after drying and/or freezing at -20°C. They are recommended for cryopreservation storage.