Hoya plants are a popular type of houseplant that is known for its waxy leaves and fragrant flowers. There are over 200 species of Hoya plants, each with its own unique characteristics and growing requirements. Here is a guide to some of the most common types of Hoya houseplants:

1. Hoya Carnosa: Hoya Carnosa is one of the most common types of Hoya plants. It has waxy, green leaves and produces clusters of star-shaped flowers that are typically pink or white in color. This plant is relatively easy to care for and can tolerate a wide range of growing conditions.

2. Hoya Kerrii: Hoya Kerrii is a unique Hoya plant that is often grown as a single heart-shaped leaf. This plant is sometimes called the "sweetheart plant" because of its heart-shaped leaves. It can be grown in a pot or as a hanging basket and is relatively easy to care for.

3. Hoya Lacunosa: Hoya Lacunosa is a smaller Hoya plant that is known for its fragrant flowers. The plant has small, green leaves and produces clusters of flowers that are typically white or pale pink in color. It prefers bright, indirect light and well-draining soil.

4. Hoya Pubicalyx: Hoya Pubicalyx is a fast-growing Hoya plant that is known for its dark green leaves and deep purple flowers. The plant can be grown in a pot or as a hanging basket and prefers bright, indirect light and well-draining soil.

5. Hoya Australis: Hoya Australis is a larger Hoya plant that is known for its large, waxy leaves and clusters of pink or white flowers. This plant prefers bright, indirect light and well-draining soil.

6. Hoya Linearis: Hoya Linearis is a unique Hoya plant that has long, slender leaves and produces clusters of white or pale pink flowers. This plant prefers bright, indirect light and well-draining soil.

7. Hoya Bella: Hoya Bella is a small Hoya plant that is known for its clusters of small, star-shaped flowers that are typically white or pink in color. This plant prefers bright, indirect light and well-draining soil.

In summary, there are many types of Hoya houseplants to choose from, each with its own unique characteristics and growing requirements. Whether you prefer a larger plant with waxy leaves and fragrant flowers or a smaller plant with heart-shaped leaves, there is a Hoya plant that is sure to suit your needs. With proper care and attention, Hoya plants can thrive and add beauty and fragrance to any indoor space.