Atropa is a genus of flowering plants in the nightshade family, Solanaceae : tall, calcicole, herbaceous perennials (rhizomatous hemicryptophytes), bearing large leaves and glossy berries particularly dangerous to children, due to their combination of an attractive, cherry-like appearance with a high toxicity.
 Atropa species favour temperate climates and alkaline soils, often growing in light shade in woodland environments associated with limestone hills and mountains.
 Their seeds can remain viable in the soil for long periods, germinating when the soil of sites in which plants once grew (but from which plants have long been absent) is disturbed by human activity or by natural causes, e.g. the windthrow of trees (a property shared by the seeds of other Solanaceae in tribe Hyoscyameae e.g. those of Hyoscyamus spp., the henbanes).
 The best-known member of the genus Atropa is Deadly Nightshade ("A. belladonna") - the poisonous plant "par excellence" in the minds of many.
 The pharmacologically active ingredients of Atropa species include atropine, scopolamine, and hyoscyamine, all tropane alkaloids having anticholinergic, deliriant, antispasmodic and mydriatic properties.
 The genus is named for Άτροπος ("Atropos") - lit.
 'she who may not be turned (aside)' - one of the Three Fates and cutter of the thread of life / bringer of death - in reference to the extreme toxicity of "A.belladonna" and its fellow species - of which three others are currently accepted.
Ledebouria socialis, the silver squill or wood hyacinth, is a geophytic species of bulbous perennial plant native to the Eastern Cape Province of South Africa.
 It was first described by John Gilbert Baker as "Scilla socialis" in 1870.
 John Peter Jessop later revised the genus "Scilla" and split off several species, reclassifying "Scilla socialis" into the genus "Ledebouria" in 1970.
 It is often cultivated and grows well with minimal care.
Scilla verna, commonly known as spring squill, is a flowering plant native to Western Europe.
 It belongs to the squill genus "Scilla".
 Its star-like blue flowers are produced during the spring.
Scilla hyacinthoides is a geophyte, native to the Middle East, though it was also brought to France by the Turks.
 Currently this plant is in the process of domestication as a cut flower in Israel due to its inflorescences.
Hyoscyamus — known as the henbanes — is a small genus of flowering plants in the nightshade family, Solanaceae.
 It comprises 11 species, all of which are toxic.
 It, along with other genera in the same family, is a source of the drug hyoscyamine (daturine).
Hyoscyamus niger, commonly known as henbane, black henbane or stinking nightshade, is a poisonous plant in the family "Solanaceae".
Hyoscyameae is an Old World tribe of the subfamily Solanoideae of the flowering plant family Solanaceae.
 It comprises seven genera: "Anisodus", "Atropa", "Atropanthe", "Hyoscyamus", "Physochlaina", "Przewalskia" and "Scopolia".
 All seven genera of the tribe are poisonous and have a long tradition of use as medicinal plants, being rich in tropane alkaloids with anticholinergic properties.
 Furthermore, the genera "Atropa", "Hyoscyamus", "Scopolia" and "Physochlaina" have furnished entheogens - the first three in the historical context of European witchcraft and, more specifically, of the flying ointments employed in such practices, while the similar chemistry of the remaining genera points to the potential for entheogenic use.
 Six of the genera have dry, pyxidial fruits i.e. capsules dehiscing by an operculum and thus resembling a pot with a lid.
 The fruit of the remaining genus "Atropa" is a glossy, juicy berry, making "Atropa" species especially dangerous poisonous plants, since - unlike other Hyoscyameae - their attractive fruits may easily be mistaken for edible berries, particularly by children - as has frequently occurred in the case of "Atropa belladonna", the infamous Deadly Nightshade.
Hyacinthoides non-scripta (formerly "Endymion non-scriptus" or "Scilla non-scripta") is a bulbous perennial plant, found in Atlantic areas from north-western Spain to the British Isles, and also frequently used as a garden plant.
 It is known in English as the common bluebell or simply bluebell, a name which is used in Scotland to refer to the harebell, "Campanula rotundifolia".
 In spring, "H. non-scripta" produces a nodding, one-sided inflorescence of 5–12 tubular, sweet-scented violet–blue flowers, with strongly recurved tepals, and 3–6 long, linear, basal leaves.
Hyoscyamus albus, the white henbane or yellow henbane, is a plant in the family of Solanaceae.
 It is found in Southern Europe.
Scilla ( ; Squill) is a genus of about 50 to 80 bulb-forming perennial herbs in the family Asparagaceae, subfamily Scilloideae, native to woodlands, subalpine meadows, and seashores throughout Europe, Africa and the Middle-East.
 A few species are also naturalized in Australia, New Zealand and North America.
 Their flowers are usually blue, but white, pink, and purple types are known; most flower in early spring, but a few are autumn-flowering.

Question: Which plant is a perenial, Scilla or Hyoscyamus?
Answer: Scilla