I can look at my office window and see my H. CITRINA presently flowering. I just went out and took these photos for you.
H. CITRINA is easy to grow. Here in the subtropics it dies back in the colder months but doesn't disappear below ground. It Is nocturnal, reblooms and produces proliferations. It is easily pod and pollen fertile and highly perfumed. It attracts hawk moths at night. Here it flowers in the first week of the third month of spring. Mine show resistance to rust.
(A thunderstorm is looming in the background).