Echium gentianoides is a synonym of "Echium thyrsiflorum" , a flowering plant in the borage family Boraginaceae with brilliant blue tubular flowers.
 It is endemic to the island of La Palma, the Canary Islands.
 It occurs in one location of La Caldera de Taburiente where it grows in sunny, rocky sites at altitudes higher than 1.800 m.
 The main threat described for this species is predation by goats.
Teide National Park (Spanish: "Parque nacional del Teide" , ] ) is a national park located in Tenerife (Canary Islands, Spain).
Idafe Rock is a natural stone pillar located in Caldera de Taburiente National Park on the island of La Palma in the Canary Islands.
Echium wildpretii" subsp.
 "trichosiphon is an "Echium" that is found high up in the area of La Caldera de Taburiente on the Canary Island of La Palma.
 Like its sister plant on Tenerife, this plant forms a large rosette of silvery leaves which eventually give rise to tall spikes of bright pink flowers.
 The plant is biennial and dies after flowering.
 This plant can be grown in gardens, but requires good drainage and fairly mild conditions.
 The plant hates water falling in the centre of the rosette and will often rot in such conditions.
Adenocarpus viscosus is a shrubby species of flowering plant in the legume family Fabaceae, subfamily Faboideae.
 It is endemic to the Canary Islands where it is known locally as Codeso del Pico.
 It can be found above 1800 m on two of the islands, La Palma in Caldera de Tabouriente and Tenerife where it is a dominant shrub in Teide National Park and occurs in parts of Corona Forestal Nature Park and Reserva Especial de las Palomas.
Roque de los Muchachos (English: "Rock of the Boys") is a rocky mound at the highest point on the island of La Palma in the Canary Islands, Spain.
 The rocks are found at an elevation of 2,423 m above sea level, not far from the Observatorio del Roque de los Muchachos, where some of the world's largest telescopes are situated; the altitude and the dryness of the climate here give rise to excellent observing conditions.
 The rocks are contained with the Parque Nacional de la Caldera de Taburiente.
Barlovento (Spanish for windward) is a municipality in the northern part of the island of La Palma, one of the Canary Islands, and a part of the province of Santa Cruz de Tenerife.
 Barlovento is on the main highway which encircles the island.
 The land rises steeply from a small coastal plain, to the rim of the Caldera de Taburiente at Pico de la Cruz (2,350m)
The Roque Cinchado is a rock formation, regarded as emblematic of the island of Tenerife (Canary Islands, Spain).
 It lies within the Teide National Park (a World Heritage Site) in the municipality of La Orotava, near the volcano of the same name, in the heart of the island.
 The Roque Cinchado is one of the largest in the world by altitude, for the entire park totals more than 2000 metres.
Caldera de Taburiente National Park (Spanish: "Parque Nacional de la Caldera de Taburiente" ) is large geological feature on the island of La Palma, Canary Islands, Spain.
 It contains the enormous expanse of the Caldera de Taburiente which dominates the northern part of the island, and was designated as a national park in 1954.
 The telescopes of the Roque de los Muchachos Observatory are situated very close to the summit.
Valles Caldera (or Jemez Caldera) is a 13.7 mi wide volcanic caldera in the Jemez Mountains of northern New Mexico.
 Hot springs, streams, fumaroles, natural gas seeps and volcanic domes dot the caldera floor landscape.
 The highest point in the caldera is Redondo Peak, an 11253 ft resurgent lava dome located entirely within the caldera.
 Also within the caldera are several grass valleys ["Valle(s)"] the largest of which is Valle Grande ( ), the only one accessible by a paved road.
 Much of the caldera is within the Valles Caldera National Preserve, a unit of the National Park System.

Question: Caldera de Taburiente National Park and Teide National Park are located in which island chain?
Answer: Canary Islands, Spain