Herbertia
Sweet, 1827
Herbertia is a of geophytic monocots in the Iridaceae, tribe Tigridieae. The genus comprises 12 , with 11 occurring in the grassland of Río de La Plata and nine to this region. Species are characterized by violet flowers with free unequal tepals and propagate through both and vegetative bulb fragmentation. is documented in at least one species, with distinct cytotypes showing morphological differentiation.
Pronunciation
How to pronounce Herbertia: /hɛrˈbɛr.ti.a/
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Identification
Herbertia can be distinguished from related Iridaceae by their free unequal tepals and violet flower coloration. Within the genus, species identification relies on tepal : outer tepal coloration and trichome presence, inner tepal shape (oblong versus other forms), and stamen characteristics including filament length and anther size. Leaf width, spathe length, and overall habit (delicate versus robust) further differentiate species. Polyploid cytotypes within H. lahue show morphological differences in pollen grain size, bulb dimensions, and ovary size.
Habitat
Humid stony grasslands of the Río de La Plata region; grasslands of the southern Neotropical region. occupy geophyte-rich in open grassland .
Distribution
South America, primarily the grassland of Río de La Plata. Herbertia lahue occurs in Brazil, Argentina, Uruguay, Paraguay, and Chile. Herbertia guyunusae is to south-central Rio Grande do Sul state, Brazil.
Life Cycle
Geophytic ; overwinters underground as bulbs. Vegetative propagation occurs through bulb fragmentation. via insect pollination produces seeds.
Similar Taxa
- TigridiaAlso in tribe Tigridieae with showy flowers, but distinguished by different floral structure and lack of documented polyploid series in Herbertia
- Other Iridaceae geophytesShare bulbous habit but differ in tepal fusion, coloration, and stamen