PlantaeDB Logo
Login Sign-up

Genus Notholirion in Family Liliaceae

In botanical taxonomy, a genus (plural genera) is a rank used to group closely related species within a family. In the hierarchy, genus sits below family and above species.

Genera are defined by shared morphological, anatomical, and genetic characteristics (for example, features of flowers, fruits, seeds, or leaves) that indicate a close evolutionary relationship among the species they contain.

Each genus can include one or more species. Examples include Rosa (roses) and Solanum (nightshades, including tomato and eggplant).

Do you wish to read more about plant taxonomy? Click here!

Genus Description

Suggest a correction!

Notholirion Wall. ex Voigt & Boiss. (Liliaceae) comprises about five bulbous perennial herbs ranging from the western Himalaya through the Himalaya–Hengduan Mountains to China, with a single species reaching Japan, typically in alpine meadows, scree, open forest margins and rocky slopes (Tanaka, 2010; Chen et al., 2014). The type species, N. thomsonii (Lindl.) Boiss., is a historical name still accepted in current treatments (Tanaka, 2010; POWO, 2024). The plants form solitary, tunicated corms and a rosette of soft, herbaceous, linear to narrowly oblanceolate leaves that wither at flowering; stems are erect, simple, and unbranched. The inflorescence is a terminal raceme of nodding, showy flowers whose perianth segments are slightly fused at the base, forming a campanulate tube that is red to pink in N. thomsonii and generally lavender to lilac in most other species; a slight perigonal nectary is present, and the ovary is inferior with axile placentation. The fruit is an erect, loculicidal capsule with flattened, winged seeds (Tanaka, 2010; Chen et al., 2014).

Centers of diversity lie in the Himalaya and the eastern Himalaya–Hengduan Mountains, with numerous local endemics such as N. koeiei in Iran and N. bulbiferum in the western Himalaya (Tanaka, 2010; Chen et al., 2014). Typical habitats occur at mid to high elevations, often on well-drained soils in open, often stony, montane and subalpine sites. Floral morphology suggests insect pollination; however, specific pollinators remain insufficiently documented, and no specific dispersal mechanism is well supported. Cytology is relatively consistent with a base number of x=12, as seen in counts reported for N. thomsonii and others (Tanaka, 2010), though intraspecific variation has been noted. Molecular work places Notholirion within Lilieae alongside Lilium and Fritillaria (Rønsted et al., 2005; Chase et al., 2015), confirming its position in Liliaceae. Traditional sectional treatments—such as N. subg. Notholirion and N. subg. Pseudolilium—are used in some literature (Tanaka, 2010), but modern phylogenetic frameworks (Rønsted et al., 2005) do not uniformly support this circumscription, and alternative synopses treat N. bulbiferum within Fritillaria (e.g., B. L. Burtt, 1956), a view explicitly rejected in contemporary revisions (Chen et al., 2014). The Hortus Botanicus Sinicus treatment recognizes fewer species, whereas POWO (2024) and modern floras maintain a moderate Notholirion species count (Chen et al., 2014; Tanaka, 2010).

Several species are cultivated as ornamentals for their early, pendulous, campanulate flowers, particularly N. thomsonii, and to a lesser extent N. campanulatum (Chen et al., 2014). None have major economic uses in timber, crops or horticulture beyond specialty cultivation. Conservation concerns are not widely documented, though localized threats may affect narrow endemics; targeted surveys of Himalayan and southwestern Chinese taxa are needed to clarify conservation status. Continued phylogenetic resolution within Lilieae, supported by thorough morphological–molecular integration, will help clarify species limits and infrageneric structure (Rønsted et al., 2005; Chase et al., 2015).

Pick a Species to see its components: