# Alpine Sunflower (*hymenoxys grandiflora*)

The Alpine Sunflower, also known as 'Old-Man-of-the-Mountain,' is an iconic and remarkably resilient wildflower native to the high-altitude tundras of North America's Rocky Mountains. Living in one of the harshest environments on Earth, this slow-growing perennial spends several years accumulating nutrients in a harsh, cold climate before producing a single, spectacularly large yellow bloom. This plant is celebrated by hikers and botanists alike for its cheerful appearance amidst barren rocky slopes and its fascinating adaptation of always facing eastward to catch the first warming rays of the morning sun.

- **Category:** [Plants](https://www.snappit.app/explore/categories/plant)
- **Rarity:** Common
- **Danger:** 1/5 · Very low
- **Snaps:** 2
- **Habitat:** Found on gravelly alpine tundras, rocky ridges, and talus slopes high above the treeline.

![Alpine Sunflower](https://inaturalist-open-data.s3.amazonaws.com/photos/2399354/medium.jpg)

Photo: no rights reserved, uploaded by Erica Krimmel, CC0 · [iNaturalist](https://www.inaturalist.org/photos/2399354)

## Appearance

This low-growing wildflower features a single, disproportionately large daisy-like flower head measuring up to 8 centimeters across, boasting bright golden-yellow ray petals and a darker yellow central disc. The short, sturdy stem and deeply divided, lobed leaves are densely covered in thick, white, woolly hairs that give the plant a silvery-green or fuzzy appearance. It typically grows close to the ground, reaching heights of only 8 to 30 centimeters to avoid the punishing alpine winds.

## Taxonomy

- **Kingdom:** Plantae
- **Phylum:** Tracheophyta
- **Class:** Magnoliopsida
- **Order:** Asterales
- **Family:** Asteraceae
- **Genus:** Hymenoxys

## Interesting facts

- Because the flower heads always face east, lost hikers in the Rocky Mountains can actually use them as a natural compass.
- Its fuzzy, bearded look earned it the popular local nickname 'Old-Man-of-the-Mountain' among mountaineers.
- The plant is monocarpic, meaning it grows for up to 10 years, flowers just once, and then dies immediately after setting its seeds.

## Special abilities

- **East-Facing Heliotropism:** The developing flower buds track the sun, but upon opening, they permanently face east to capture the morning sun, maximizing warmth to attract chilled alpine pollinators.
- **Woolly Thermoregulation:** Dense, felt-like white hairs cover the stems and leaves, creating a micro-boundary layer that insulates the plant from freezing temperatures and blocks intense UV radiation.
- **Monocarpic Life Strategy:** The plant conserves energy for up to a decade in a harsh climate to produce a single massive, successful reproductive event before dying.

## Measurements & details

- **Length:** 8+ cm
- **Weight:** 0.005+ kg
- **Lifespan:** 5+ years

## Diet & Feeding

The Alpine Sunflower is a photosynthetic organism that generates its own energy from sunlight, water, carbon dioxide, and essential soil minerals.

- **Primary Foods:** Sunlight, Water, Carbon Dioxide, Soil Nutrients

## Ecological connections

- **Mutualism:** Golden-belted Bumblebee (*Bombus balteatus*) — Relies heavily on high-altitude bumblebees for pollination to successfully fertilize its seeds during its single blooming season.
- **Eaten by:** American Pika (*Ochotona princeps*) — Leaves and flowers are collected, dried, and stored in haypiles as a vital winter food source by small alpine mammals.
- **Competitor:** [Moss Campion](https://www.snappit.app/explore/moss-campion) (*Silene acaulis*) — Competes for limited soil moisture, nutrients, and space with other low-growing alpine plants in gravelly soils.

## Safety

**Danger:** 1/5 · Very low

No special safety notes yet.

## Frequently Asked Questions

### How to identify Alpine Sunflower?

Start with the whole plant, then compare leaf arrangement, leaf edges, stems and any flowers or fruit. Opposite leaves grow in pairs; alternate leaves come one at a time along the stem. These details tell you far more together than a single green leaf does. Plant Identifier: upload a photo and compare the visible details.

### How long is Alpine Sunflower?

8+ cm

### How much does Alpine Sunflower weigh?

0.005+ kg

### How long does Alpine Sunflower live?

5+ years

### What does Alpine Sunflower eat?

The Alpine Sunflower is a photosynthetic organism that generates its own energy from sunlight, water, carbon dioxide, and essential soil minerals.

### Where is Alpine Sunflower usually found?

Found on gravelly alpine tundras, rocky ridges, and talus slopes high above the treeline.

## Where to spot

- [Independence](https://www.snappit.app/guides/places/independence) — Colorado, US · Neighborhood
- [Summit Lake Park](https://www.snappit.app/guides/places/summit-lake-park) — Colorado, US · Natural Landmark

## More Plants

- [white snakeroot](https://www.snappit.app/explore/white-snakeroot) (*Ageratina altissima*)
- [tree-of-heaven](https://www.snappit.app/explore/tree-of-heaven) (*Ailanthus altissima*)
- [western sword fern](https://www.snappit.app/explore/western-sword-fern) (*Polystichum munitum*)
- [common milkweed](https://www.snappit.app/explore/common-milkweed) (*Asclepias syriaca*)

---

Source: [Alpine Sunflower: Facts & Places to See — Snappit](https://www.snappit.app/explore/alpine-sunflower)