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Helianthus grosseserratus, commonly known as sawtooth sunflower or thick-tooth sunflower, [3] is a perennial sunflower in the family Asteraceae, ...
Helianthus gracilentus A.Gray – slender sunflower – California; Helianthus grosseserratus M.Martens – sawtooth sunflower – Great Plains, Great Lakes, Ontario, Quebec; Helianthus heterophyllus Nutt. – variableleaf sunflower – Coastal plain of Texas to North Carolina; Helianthus hirsutus Raf.
Hairy sunflower (Helianthus hirsutus) Maximilian's sunflower (Helianthus maximiliani) Nuttall's sunflower (Helianthus nuttallii ssp. rydbergii; special concern) Prairie sunflower (Helianthus petiolaris var. petiolaris) Sawtooth sunflower (Helianthus grosseserratus) Stiff sunflower (Helianthus pauciflorus) Tickseed sunflower (Bidens aristosa ...
Sunflower species (well, almost all of them) have both disk flowers (on the inside of the head), and then ray flowers (on the outside), which a lot of people, certainly not the faithful readers of ...
The Sonoran Desert. The Sonoran Desert is a North American desert and ecoregion which covers large parts of the southwestern United States and of northwestern Mexico. With an area of 260,000 square kilometers (100,000 sq mi), it is the hottest desert in Mexico.
The Heliantheae (sometimes called the sunflower tribe) are the third-largest tribe in the sunflower family . With some 190 genera and nearly 2500 recognized species, only the tribes Senecioneae and Astereae are larger. The name is derived from the genus Helianthus, which is Greek for sun flower.
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