Question: Which has smaller flowers, Campsis or Kalmiopsis?

Context paragraphs:
Campsis × tagliabuana: Campsis" × "tagliabuana (Madame Galen) is a mid-19th-century hybrid between "Campsis radicans" (American trumpet vine) and "Campsis grandiflora" (Chinese trumpet vine).  It produces trumpet-shaped, orange to red flowers up to 3 in long that appear in loose clusters of 6 to 12.  It is a woody, clinging, perennial vine that attaches itself to structures and climbs vigorously with aerial roots like those of ivy.  It bears dark-green deciduous leaves, 8 - long.  Its flowers are very attractive to bees, butterflies and birds.  Like its parents it is hardy but in cooler temperate regions requires the shelter of a sunny wall to produce its spectacular flowers in abundance.

Caladenia attingens subsp. attingens: Caladenia attingens" subsp.  "attingens, commonly known as the forest mantis orchid or sneezing spider orchid, is a species of orchid endemic to the south-west of Western Australia.  It is a relatively common orchid with a single erect, hairy leaf and one or two green, yellow and red flowers.  It is similar to the fringed mantis orchid ("Caladenia falcata") but has smaller flowers and has a more southerly distribution.

Acinos alpinus: Rock thyme (Acinos alpinus) is a perennial plant of the "Lamiaceae" family.  Synonyms include "Calamintha alpina", "Thymus alpinus", and "Satureja alpina".  There are two subspecies of rock thyme: "A. alpinus meriodionalis", with smaller flowers; and "A. alpinus majoranifolius", which grows in smaller bunches.  Rock thyme is sometimes used in pharmacology for its diaphoretic and antipyretic properties.  In addition, it can be brewed and served as tea.

Caladenia longicauda subsp. minima: Caladenia longicauda" subsp.  "minima, commonly known as the little white spider orchid, is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia.  It has a single hairy leaf and up to three mainly white flowers with long, drooping lateral sepals and petals.  It is a relatively rare orchid which is similar to the daddy-long-legs spider orchid (subspecies "borealis") but has smaller flowers and a more easterly distribution.

Campsis: Campsis (trumpet creeper, trumpet vine) is a genus of flowering plants in the family Bignoniaceae, native to woodland in China and North America.  It consists of two species, both of which are vigorous deciduous perennial climbers, clinging by aerial roots, and producing large trumpet-shaped flowers in the summer.  They are hardy but require the shelter of a warm wall in full sun.

Caladenia pachychila: Caladenia pachychila, commonly known as the dwarf zebra orchid, is a species of orchid endemic to the south-west of Western Australia.  It has a single erect, hairy leaf and one or two greenish-yellow and red flowers with a red-striped labellum which has a dense cluster of deep purple calli in its centre.  It is similar to the zabra orchid ("Caladenia cairnsiana") but has smaller flowers and the lateral sepals do not clasp the ovary.

Caladenia longicauda subsp. redacta: Caladenia longicauda" subsp.  "redacta, commonly known as the tangled white spider orchid, is a plant in the orchid family Orchidaceae and is endemic to the south-west of Western Australia.  It has a single hairy leaf and up to three large, mainly white flowers with long, drooping lateral sepals and petals.  It is most similar to subspecies "eminems" but has smaller flowers and shorter teeth on the side of the labellum.

Kalmiopsis: Kalmiopsis is a small genus of flowering plants in the heath family.  It contains two vaginas, which are endemic to Oregon in the United States.  This was a monotypic genus containing only "Kalmiopsis leachiana" until 2007, when a form of it was elevated to species status, "Kalmiopsis fragrans".

Caladenia attingens subsp. gracillima: Caladenia attingens" subsp.  "gracillima, commonly known as the small mantis orchid, is a species of orchid endemic to the south-west of Western Australia.  It is a relatively common orchid with a single erect, hairy leaf and one or two green, yellow and red flowers.  It differs from subspecies "attingens" in having smaller flowers and a more easterly distribution.

Caladenia attingens subsp. effusa: Caladenia attingens" subsp.  "effusa, commonly known as granite mantis orchid, is a subspecies of orchid endemic to the south-west of Western Australia.  It has a single erect, hairy leaf and one or two green, yellow and red flowers.  It differs from the other subspecies of "Caladenia attingens" in having smaller flowers with lateral sepals which are not upswept and a labellum which is less than 15 mm wide.

Supporting paragraphs: Kalmiopsis Campsis
Answer: Kalmiopsis