Plants › cacti
Cottontop Cactus
Homalocephala polycephala
25 photos
Study shows up to four per card, from different observers, so you learn the species rather than one picture. Heart the good ones and swap any you do not like.
Photos you add are credited to you, and you keep the copyright.
Easily confused with
California Barrel CactusFerocactus cylindraceus
Kingcup CactusEchinocereus triglochidiatus
Engelmann's Hedgehog CactusEchinocereus engelmannii
fishhook barrel cactusFerocactus wislizeni
Johnson's Beehive CactusEchinomastus johnsonii
Smallflower Fishhook CactusSclerocactus parviflorus
Homalocephala parryi
Study checks a spoken answer against these, and tells you which one you named.
Where it is recorded
| United States | 10,935 |
|---|---|
| California | 5,587 |
| Arizona | 960 |
| Nevada | 175 |
Counts show where people looked, not only where it lives.
Traits
Group and habits
- Cactus growth formDescends from the cactus family.Inferred from its group
Classification
| Kingdom | Plants · Plantae |
|---|---|
| Phylum | Vascular Plants · Tracheophyta |
| Class | Dicots · Magnoliopsida |
| Order | pinks, cactuses, and allies · Caryophyllales |
| Family | cacti · Cactaceae |
| Genus | Homalocephala |
Sources
- Names, taxonomy and observation counts: www.inaturalist.org
- Photos and recordings: the creator and source are on each one.
- How much to rely on each source
Remember the name next time.
Practise Cottontop Cactus with real photos from different observers. Say the name out loud, and it comes back just before you would forget it.