Charles Bixler Heiser

Capsicum cardenasii is a plant species in the genus Capsicum and the family Solanaceae. It is a diploid with 2n=2x=24. It is a member within the C. pubescens complex, a group of closely related Capsicum species. It is closely related to C. eximium. It is native to the Andes, and it can be found in Bolivia and Peru. The native name is ulupica.

Solanum pseudolulo is a subtropical perennial plant from northwestern South America. The pseudolulo is a large herbaceous plant or a small shrub, with heart-shaped leaves. The leaves and stems of the plant are covered in short hairs, and the entire plant is often covered in sharp spines. Occasionally known as lulo de perro, the pseudolulo bears edible fruit, but is rarely cultivated. Instead, the plant proliferates as a weedy species at medium-altitude locations in Colombia and Ecuador. The fruit is generally regarded as inferior to the true lulo - naranjilla - but the fruit is occasionally

Helianthus paradoxus, the paradox sunflower, puzzle sunflower or Pecos sunflower, is a threatened species of sunflower found only in west Texas, Utah, and New Mexico salt marshes by the edges of inland salt lakes and salt flats. Helianthus paradoxus formed 75,000-208,000 years ago as a hybrid of H. annuus, the common sunflower, and Helianthus petiolaris, the prairie sunflower. The hybrid is more tolerant of salt than either parent species. Helianthus paradoxus is found in areas with salinity levels range from 10 to 40 parts per thousand. Due to its ability to withstand such high levels of

Capsicum annuum var. glabriusculum, a chili-pepper variety of Capsicum annuum, is native to southern North America and northern South America. Common names include chiltepín, Indian pepper, grove pepper, chiltepe, and chile tepín, as well as turkey, bird’s eye, or simply bird peppers (due to their consumption and spread by wild birds; "unlike humans birds are impervious to the heat of peppers"). Tepín is derived from a Nahuatl word meaning "flea". This variety is the most likely progenitor of the domesticated C. annuum var. annuum. Another similar-sized pepper, 'Pequin' (also called 'piquin')

Helianthus neglectus is a species of sunflower known by the common names neglected sunflower. It is native to the southwestern United States in southeastern New Mexico and West Texas. Helianthus neglectus grows on sand dunes and other sandy soil. This wildflower is an annual herb up to 200 cm (almost 7 ft) tall, growing from a thick, fleshy taproot. One plant produces one to five flower heads containing 21-31 yellow ray florets surrounding 150 or more red or purple disc florets. Helianthus neglectus hybridizes with several other species in the region: H. annuus, H. debilis, and H. petiolaris.

Helianthus deserticola, the desert sunflower, is a plant species native to Arizona, Nevada and Utah. It grows in dry, sun-lit locations at elevations of 400–1,500 m (1,300–4,900 ft). Helianthus deserticola is a daughter species of the species Helianthus annuus and Helianthus petiolaris. Helianthus deserticola is an annual herb up to 40 centimetres (16 in) tall with abundant resin dots on the foliage. Leaves are up to 5 centimetres (2.0 in) long. Flower heads contain approximately 7-13 ray flowers and more than 25 disc flowers.

Helianthus smithii is a rare North American species of sunflower known by the common name Smith's sunflower. It is native to the southeastern United States, in Tennessee, Alabama, and Georgia. Helianthus smithii grows in wet, mucky soils in marshes, ditches, and roadsides. It is a perennial herb up to 260 cm (over 8 feet) tall, spreading by means of underground rhizomes. One plant usually produces 1-15 flower heads, each containing 12–23 yellow ray florets surrounding 100 or more red, yellow, or brown disc florets. The oldest name for this plant is Helianthus parviflorus var. attenuatus,

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Helianthus debilis subsp. cucumerifolius, or cucumberleaf dune sunflower, is a subspecies of the species Helianthus debilis in the genus Helianthus, family Asteraceae. It is native to the South Central regions of the United States and exists naturalized in every continent except Antarctica.

Blennosperma bakeri is a rare species of flowering plant in the daisy family known by the common names Baker's stickyseed and Sonoma sunshine.

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Helianthus nuttallii subsp. parishii is a subspecies of the species Helianthus nuttallii in the genus Helianthus, family Asteraceae. It is also known by the common names Los Angeles sunflower and Parish's sunflower. This subspecies has not been seen, in the wild or in cultivation, since 1937.

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Pappobolus nigrescens is a species of flowering plant in the family Asteraceae. It is found only in Ecuador. Its natural habitat is subtropical or tropical moist montane forests. It is threatened by habitat loss.

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