This herbaceous perennial, reaching heights of up to 25 cm, exhibits a semi-parasitic nature. Its upright stems are adorned with slender leaves. During the summer months, it produces terminal clusters featuring red-orange bracts, which transition to apple green at their bases, complemented by red flowers.

Castilleja comprises both annual and perennial herbaceous species characterized by vibrant red leaf-like bracts that encircle white to green flowers, typically blooming from early to mid-spring.

Castilleja miniata

Castilleja nana

Castilleja occidentalis

Castilleja oresbia

Castilleja pallescens var. inverta

Castilleja pallida

Castilleja parviflora var. albida

Castilleja parviflora var. oreopola

Castilleja parvula

Castilleja parvula var. parvula

Castilleja pilosa var. longispica

Castilleja pilosa var. pilosa

Castilleja pruinosa

Castilleja revealii

Castilleja rhexiifolia

Castilleja rubida

Castilleja rupicola

Castilleja scabrida is a semi-parasitic perennial herb that typically reaches a height of 15 cm. Its stems can vary in color from green to purple and are densely covered in coarse hairs. The narrow, grey-green leaves measure between 5 to 8 cm in length. From spring through summer, it produces small tubular flowers that are yellow-green, accented by vivid red bracts. This species commonly attaches to the roots of host plants, particularly Penstemons, but generally exerts minimal negative impact on its hosts.

Castilleja scabrida

Castilleja schizotricha

Castilleja sessiliflora

Castilleja sulphurea

Castilleja tenuiflora

Castilleja tenuifolia

Castilleja thompsonii

Castilleja unalaschcensis

Castilleja viscidula

Castilleja wightii

Centranthera hispida

Cistanche deserticola

Cistanche phelypaea

Cistanche tubulosa

Conopholis americana

Cymbaria daurica

Epifagus virginiana

Euphrasia

Euphrasia anglica

Euphrasia azorica

Euphrasia brevipila

Euphrasia cambrica

Euphrasia cebennensis

Euphrasia confusa

Euphrasia dinarica

Euphrasia frigida is a low-statured, hemi-parasitic annual, reaching heights of 3 to 15 cm. Its stems bend at the base, supporting heart-shaped foliage. From July to August, it produces small white flowers adorned with violet veins, each measuring 5 to 7 mm long.

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